[RESOLVED] af pan returns empty/silent wav

Questions involving a Windows version of FFmpeg.
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testuser31
Posts: 3
Joined: Wed Oct 19, 2016 1:58 pm

[RESOLVED] af pan returns empty/silent wav

Post by testuser31 » Wed Oct 19, 2016 2:22 pm

Log from working ffmpeg version:

Code: Select all

ffmpeg started on 2016-10-19 at 15:02:39
Report written to "ffmpeg-20161019-150239.log"
Command line:
"c:\\driver\\ffmpeg\\bin\\ffmpeg" -report -i "d:\\other\\musix\\test.m4a" -c:a pcm_s32le -af "pan=2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL" "d:\\method\\audio.wav"
ffmpeg version N-81774-g64545dd Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.4.0 (GCC)
  configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
  libavutil      55. 30.100 / 55. 30.100
  libavcodec     57. 58.100 / 57. 58.100
  libavformat    57. 50.100 / 57. 50.100
  libavdevice    57.  0.102 / 57.  0.102
  libavfilter     6. 63.100 /  6. 63.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  1.100 /  2.  1.100
  libpostproc    54.  0.100 / 54.  0.100
Splitting the commandline.
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
Reading option '-i' ... matched as input file with argument 'd:\other\musix\test.m4a'.
Reading option '-c:a' ... matched as option 'c' (codec name) with argument 'pcm_s32le'.
Reading option '-af' ... matched as option 'af' (set audio filters) with argument 'pan=2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL'.
Reading option 'd:\method\audio.wav' ... matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option report (generate a report) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input file d:\other\musix\test.m4a.
Successfully parsed a group of options.
Opening an input file: d:\other\musix\test.m4a.
[file @ 000000000054eb80] Setting default whitelist 'file,crypto'
[mov,mp4,m4a,3gp,3g2,mj2 @ 000000000054e380] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 000000000054e380] ISO: File Type Major Brand: M4A 
[mov,mp4,m4a,3gp,3g2,mj2 @ 000000000054e380] Unknown dref type 0x08206c7275 size 12
[mov,mp4,m4a,3gp,3g2,mj2 @ 000000000054e380] Before avformat_find_stream_info() pos: 13839 bytes read:32768 seeks:0 nb_streams:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 000000000054e380] demuxer injecting skip 2112 / discard 0
[aac @ 000000000055fb80] skip 2112 / discard 0 samples due to side data
[aac @ 000000000055fb80] skip whole frame, skip left: 1088
[mov,mp4,m4a,3gp,3g2,mj2 @ 000000000054e380] All info found
[mov,mp4,m4a,3gp,3g2,mj2 @ 000000000054e380] After avformat_find_stream_info() pos: 13858 bytes read:32768 seeks:0 frames:1
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'd:\other\musix\test.m4a':
  Metadata:
    major_brand     : M4A 
    minor_version   : 0
    compatible_brands: M4A mp42isom
    creation_time   : 2016-01-21T16:20:19.000000Z
    encoder         : qaac 2.58, CoreAudioToolbox 7.10.5.0, AAC-LC Encoder, TVBR q127, Quality 96
    Encoding Params : vers
    iTunSMPB        :  00000000 00000840 000001C0 00000000002BF200 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
  Duration: 00:01:00.05, start: 0.044000, bitrate: 172 kb/s
    Stream #0:0(und), 1, 1/48000: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 170 kb/s (default)
    Metadata:
      creation_time   : 2016-01-21T16:20:19.000000Z
Successfully opened the file.
Parsing a group of options: output file d:\method\audio.wav.
Applying option c:a (codec name) with argument pcm_s32le.
Applying option af (set audio filters) with argument pan=2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL.
Successfully parsed a group of options.
Opening an output file: d:\method\audio.wav.
[file @ 000000000057dce0] Setting default whitelist 'file,crypto'
Successfully opened the file.
detected 2 logical cores
[Parsed_pan_0 @ 00000000004c94c0] compat: called with args=[2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL]
[Parsed_pan_0 @ 00000000004c94c0] Setting 'args' to value '2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL'
[graph 0 input from stream 0:0 @ 00000000004c9a40] Setting 'time_base' to value '1/48000'
[graph 0 input from stream 0:0 @ 00000000004c9a40] Setting 'sample_rate' to value '48000'
[graph 0 input from stream 0:0 @ 00000000004c9a40] Setting 'sample_fmt' to value 'fltp'
[graph 0 input from stream 0:0 @ 00000000004c9a40] Setting 'channel_layout' to value '0x3f'
[graph 0 input from stream 0:0 @ 00000000004c9a40] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x3f
[audio format for output stream 0:0 @ 00000000004cb380] Setting 'sample_fmts' to value 's32'
[audio format for output stream 0:0 @ 00000000004cb380] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_pan_0' and the filter 'audio format for output stream 0:0'
[AVFilterGraph @ 0000000000557460] query_formats: 4 queried, 6 merged, 3 already done, 0 delayed
[Parsed_pan_0 @ 00000000004c94c0] [SWR @ 0000000002b051c0] Using fltp internally between filters
[Parsed_pan_0 @ 00000000004c94c0] o0 = 0.414 i0 + 0 i1 + 0.552 i2 + 0 i3 + 0.483 i4 + -0.448 i5
[Parsed_pan_0 @ 00000000004c94c0] o1 = 0 i0 + 0.414 i1 + 0.552 i2 + 0 i3 + -0.448 i4 + 0.483 i5
[auto-inserted resampler 0 @ 00000000004cb7a0] [SWR @ 0000000002af8200] Using fltp internally between filters
[auto-inserted resampler 0 @ 00000000004cb7a0] ch:2 chl:stereo fmt:fltp r:48000Hz -> ch:2 chl:stereo fmt:s32 r:48000Hz
Output #0, wav, to 'd:\method\audio.wav':
  Metadata:
    major_brand     : M4A 
    minor_version   : 0
    compatible_brands: M4A mp42isom
    iTunSMPB        :  00000000 00000840 000001C0 00000000002BF200 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    Encoding Params : vers
    ISFT            : Lavf57.50.100
    Stream #0:0(und), 0, 1/48000: Audio: pcm_s32le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s32, 3072 kb/s (default)
    Metadata:
      creation_time   : 2016-01-21T16:20:19.000000Z
      encoder         : Lavc57.58.100 pcm_s32le
Stream mapping:
  Stream #0:0 -> #0:0 (aac (native) -> pcm_s32le (native))
Press [q] to stop, [?] for help
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[aac @ 0000000000571460] skip 2112 / discard 0 samples due to side data
[aac @ 0000000000571460] skip whole frame, skip left: 1088
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[aac @ 0000000000571460] skip whole frame, skip left: 64
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[aac @ 0000000000571460] skip 64/1024 samples
[output stream 0:0 @ 00000000004cb200] EOF on sink link output stream 0:0:default.
No more output streams to write to, finishing.
size=   22504kB time=00:01:00.00 bitrate=3072.0kbits/s speed= 139x    
video:0kB audio:22504kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000443%
Input file #0 (d:\other\musix\test.m4a):
  Input stream #0:0 (audio): 2815 packets read (1283405 bytes); 2813 frames decoded (2880448 samples); 
  Total: 2815 packets (1283405 bytes) demuxed
Output file #0 (d:\method\audio.wav):
  Output stream #0:0 (audio): 2813 frames encoded (2880448 samples); 2813 packets muxed (23043584 bytes); 
  Total: 2813 packets (23043584 bytes) muxed
2813 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0000000000579ca0] Statistics: 4 seeks, 2816 writeouts
[AVIOContext @ 0000000000556d40] Statistics: 1297221 bytes read, 0 seeks
Log from failed log:

Code: Select all

ffmpeg started on 2016-10-19 at 15:05:33
Report written to "ffmpeg-20161019-150533.log"
Command line:
"c:\\driver\\ffmpeg\\bin\\ffmpeg" -report -i "d:\\other\\musix\\test.m4a" -c:a pcm_s32le -af "pan=2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL" "d:\\method\\audio.wav"
ffmpeg version N-82036-g0ad71ed Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.4.0 (GCC)
  configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
  libavutil      55. 32.100 / 55. 32.100
  libavcodec     57. 61.103 / 57. 61.103
  libavformat    57. 52.100 / 57. 52.100
  libavdevice    57.  0.102 / 57.  0.102
  libavfilter     6. 64.100 /  6. 64.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  2.100 /  2.  2.100
  libpostproc    54.  0.100 / 54.  0.100
Splitting the commandline.
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
Reading option '-i' ... matched as input file with argument 'd:\other\musix\test.m4a'.
Reading option '-c:a' ... matched as option 'c' (codec name) with argument 'pcm_s32le'.
Reading option '-af' ... matched as option 'af' (set audio filters) with argument 'pan=2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL'.
Reading option 'd:\method\audio.wav' ... matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option report (generate a report) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input file d:\other\musix\test.m4a.
Successfully parsed a group of options.
Opening an input file: d:\other\musix\test.m4a.
[file @ 0000000000477fe0] Setting default whitelist 'file,crypto'
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005107c0] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005107c0] ISO: File Type Major Brand: M4A 
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005107c0] Unknown dref type 0x08206c7275 size 12
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005107c0] Before avformat_find_stream_info() pos: 13839 bytes read:32768 seeks:0 nb_streams:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005107c0] demuxer injecting skip 2112 / discard 0
[aac @ 0000000000522000] skip 2112 / discard 0 samples due to side data
[aac @ 0000000000522000] skip whole frame, skip left: 1088
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005107c0] All info found
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005107c0] After avformat_find_stream_info() pos: 13858 bytes read:32768 seeks:0 frames:1
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'd:\other\musix\test.m4a':
  Metadata:
    major_brand     : M4A 
    minor_version   : 0
    compatible_brands: M4A mp42isom
    creation_time   : 2016-01-21T16:20:19.000000Z
    encoder         : qaac 2.58, CoreAudioToolbox 7.10.5.0, AAC-LC Encoder, TVBR q127, Quality 96
    Encoding Params : vers
    iTunSMPB        :  00000000 00000840 000001C0 00000000002BF200 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
  Duration: 00:01:00.05, start: 0.044000, bitrate: 172 kb/s
    Stream #0:0(und), 1, 1/48000: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 170 kb/s (default)
    Metadata:
      creation_time   : 2016-01-21T16:20:19.000000Z
Successfully opened the file.
Parsing a group of options: output file d:\method\audio.wav.
Applying option c:a (codec name) with argument pcm_s32le.
Applying option af (set audio filters) with argument pan=2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL.
Successfully parsed a group of options.
Opening an output file: d:\method\audio.wav.
[file @ 000000000047fe40] Setting default whitelist 'file,crypto'
Successfully opened the file.
detected 2 logical cores
[Parsed_pan_0 @ 000000000047abc0] compat: called with args=[2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL]
[Parsed_pan_0 @ 000000000047abc0] Setting 'args' to value '2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL'
[graph 0 input from stream 0:0 @ 00000000005102a0] Setting 'time_base' to value '1/48000'
[graph 0 input from stream 0:0 @ 00000000005102a0] Setting 'sample_rate' to value '48000'
[graph 0 input from stream 0:0 @ 00000000005102a0] Setting 'sample_fmt' to value 'fltp'
[graph 0 input from stream 0:0 @ 00000000005102a0] Setting 'channel_layout' to value '0x3f'
[graph 0 input from stream 0:0 @ 00000000005102a0] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x3f
[audio format for output stream 0:0 @ 000000000047c860] Setting 'sample_fmts' to value 's32'
[audio format for output stream 0:0 @ 000000000047c860] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_pan_0' and the filter 'audio format for output stream 0:0'
[AVFilterGraph @ 0000000000478800] query_formats: 4 queried, 6 merged, 3 already done, 0 delayed
[Parsed_pan_0 @ 000000000047abc0] [SWR @ 0000000002cc5060] Using fltp internally between filters
[Parsed_pan_0 @ 000000000047abc0] o0 = 0.218 i0 + 0 i1 + 0.291 i2 + 0 i3 + 0.255 i4 + -0.236 i5
[Parsed_pan_0 @ 000000000047abc0] o1 = 0 i0 + 0.218 i1 + 0.291 i2 + 0 i3 + -0.236 i4 + 0.255 i5
[auto-inserted resampler 0 @ 000000000053c2a0] [SWR @ 0000000002cb00a0] Using fltp internally between filters
[auto-inserted resampler 0 @ 000000000053c2a0] ch:2 chl:stereo fmt:fltp r:48000Hz -> ch:2 chl:stereo fmt:s32 r:48000Hz
Output #0, wav, to 'd:\method\audio.wav':
  Metadata:
    major_brand     : M4A 
    minor_version   : 0
    compatible_brands: M4A mp42isom
    iTunSMPB        :  00000000 00000840 000001C0 00000000002BF200 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    Encoding Params : vers
    ISFT            : Lavf57.52.100
    Stream #0:0(und), 0, 1/48000: Audio: pcm_s32le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s32, 3072 kb/s (default)
    Metadata:
      creation_time   : 2016-01-21T16:20:19.000000Z
      encoder         : Lavc57.61.103 pcm_s32le
Stream mapping:
  Stream #0:0 -> #0:0 (aac (native) -> pcm_s32le (native))
Press [q] to stop, [?] for help
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[aac @ 0000000002ab00a0] skip 2112 / discard 0 samples due to side data
[aac @ 0000000002ab00a0] skip whole frame, skip left: 1088
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[aac @ 0000000002ab00a0] skip whole frame, skip left: 64
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[aac @ 0000000002ab00a0] skip 64/1024 samples
[output stream 0:0 @ 000000000047b060] EOF on sink link output stream 0:0:default.
No more output streams to write to, finishing.
size=   22504kB time=00:01:00.00 bitrate=3072.0kbits/s speed= 138x    
video:0kB audio:22504kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000443%
Input file #0 (d:\other\musix\test.m4a):
  Input stream #0:0 (audio): 2815 packets read (1283405 bytes); 2813 frames decoded (2880448 samples); 
  Total: 2815 packets (1283405 bytes) demuxed
Output file #0 (d:\method\audio.wav):
  Output stream #0:0 (audio): 2813 frames encoded (2880448 samples); 2813 packets muxed (23043584 bytes); 
  Total: 2813 packets (23043584 bytes) muxed
2813 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0000000000478fc0] Statistics: 4 seeks, 2816 writeouts
[AVIOContext @ 0000000000478180] Statistics: 1297221 bytes read, 0 seeks
Any version after top version returns silent wav file; IIRC "matrix_encoding=dplii" still works.

Please advise.
Last edited by testuser31 on Tue Nov 01, 2016 7:36 am, edited 2 times in total.

llogan
Posts: 332
Joined: Fri Mar 14, 2014 3:29 am

Re: af pan returns empty/silent wav

Post by llogan » Tue Oct 25, 2016 7:46 pm

Works for me, but I don't have your input:

Code: Select all

$ ./ffmpeg -i 5.1.wav -c:a pcm_s32le -af "pan=2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL" out.wav
ffmpeg version N-82119-g1342339 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 6.2.1 (GCC) 20160830
  configuration: --enable-gpl
  libavutil      55. 33.100 / 55. 33.100
  libavcodec     57. 63.103 / 57. 63.103
  libavformat    57. 55.100 / 57. 55.100
  libavdevice    57.  0.103 / 57.  0.103
  libavfilter     6. 64.100 /  6. 64.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  2.100 /  2.  2.100
  libpostproc    54.  0.100 / 54.  0.100
Input #0, wav, from '5.1.wav':
  Metadata:
    encoder         : Lavf55.22.100
  Duration: 00:00:01.00, bitrate: 4234 kb/s
    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 5.1, s16, 4233 kb/s
Output #0, wav, to 'out.wav':
  Metadata:
    ISFT            : Lavf57.55.100
    Stream #0:0: Audio: pcm_s32le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s32, 2822 kb/s
    Metadata:
      encoder         : Lavc57.63.103 pcm_s32le
Stream mapping:
  Stream #0:0 -> #0:0 (pcm_s16le (native) -> pcm_s32le (native))
Press [q] to stop, [?] for help
size=     345kB time=00:00:01.00 bitrate=2823.2kbits/s speed= 310x    
video:0kB audio:345kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.028912%
Please use the code button instead of quote button to format commands and console outputs.

testuser31
Posts: 3
Joined: Wed Oct 19, 2016 1:58 pm

Re: af pan returns empty/silent wav

Post by testuser31 » Wed Oct 26, 2016 8:17 am

My input file was 6 channel AAC, this one produces same empty wav:

https://www2.iis.fraunhofer.de/AAC/ChID ... ration.mp4

Code: Select all

ffmpeg started on 2016-10-26 at 09:01:36
Report written to "ffmpeg-20161026-090136.log"
Command line:
"c:\\driver\\ffmpeg\\bin\\ffmpeg" -report -i "d:\\other\\musix\\ChID-BLITS-EBU-Narration.mp4" -c:a pcm_s32le -af "pan=2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL" "d:\\method\\audio.wav"
ffmpeg version N-82117-gc117343 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.4.0 (GCC)
  configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
  libavutil      55. 33.100 / 55. 33.100
  libavcodec     57. 63.103 / 57. 63.103
  libavformat    57. 55.100 / 57. 55.100
  libavdevice    57.  0.103 / 57.  0.103
  libavfilter     6. 64.100 /  6. 64.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  2.100 /  2.  2.100
  libpostproc    54.  0.100 / 54.  0.100
Splitting the commandline.
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
Reading option '-i' ... matched as input file with argument 'd:\other\musix\ChID-BLITS-EBU-Narration.mp4'.
Reading option '-c:a' ... matched as option 'c' (codec name) with argument 'pcm_s32le'.
Reading option '-af' ... matched as option 'af' (set audio filters) with argument 'pan=2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL'.
Reading option 'd:\method\audio.wav' ... matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option report (generate a report) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input file d:\other\musix\ChID-BLITS-EBU-Narration.mp4.
Successfully parsed a group of options.
Opening an input file: d:\other\musix\ChID-BLITS-EBU-Narration.mp4.
[file @ 0000000000521040] Setting default whitelist 'file,crypto'
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005208a0] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005208a0] ISO: File Type Major Brand: mp42
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005208a0] Unknown dref type 0x08206c7275 size 12
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005208a0] Processing st: 0, edit list 0 - media time: 3266, duration: 2051826
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005208a0] drop a frame at curr_cts: 0 @ 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005208a0] skip 1218 audio samples from curr_cts: 2048
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005208a0] Before avformat_find_stream_info() pos: 5288 bytes read:32768 seeks:0 nb_streams:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005208a0] demuxer injecting skip 2048 / discard 0
[aac @ 0000000000532060] element type mismatch 3 != 0
[aac @ 0000000000532060] skip 4096 / discard 0 samples due to side data
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005208a0] All info found
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005208a0] After avformat_find_stream_info() pos: 6216 bytes read:32768 seeks:0 frames:1
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'd:\other\musix\ChID-BLITS-EBU-Narration.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42isom
    creation_time   : 2012-07-22T17:48:25.000000Z
    encoder         : Fraunhofer IIS MPEG-4 Audio Encoder 03.02.11.01_MPEGScbr_SXPro
  Duration: 00:00:46.53, start: -0.027619, bitrate: 161 kb/s
    Stream #0:0(und), 1, 1/44100: Audio: aac (HE-AAC) (mp4a / 0x6134706D), 44100 Hz, 5.1, fltp, 159 kb/s (default)
    Metadata:
      creation_time   : 2012-07-22T17:48:25.000000Z
      handler_name    : soun
Successfully opened the file.
Parsing a group of options: output file d:\method\audio.wav.
Applying option c:a (codec name) with argument pcm_s32le.
Applying option af (set audio filters) with argument pan=2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL.
Successfully parsed a group of options.
Opening an output file: d:\method\audio.wav.
[file @ 0000000002b90cc0] Setting default whitelist 'file,crypto'
Successfully opened the file.
detected 2 logical cores
[Parsed_pan_0 @ 0000000000546460] compat: called with args=[2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL]
[Parsed_pan_0 @ 0000000000546460] Setting 'args' to value '2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL'
[graph 0 input from stream 0:0 @ 0000000000544ba0] Setting 'time_base' to value '1/44100'
[graph 0 input from stream 0:0 @ 0000000000544ba0] Setting 'sample_rate' to value '44100'
[graph 0 input from stream 0:0 @ 0000000000544ba0] Setting 'sample_fmt' to value 'fltp'
[graph 0 input from stream 0:0 @ 0000000000544ba0] Setting 'channel_layout' to value '0x3f'
[graph 0 input from stream 0:0 @ 0000000000544ba0] tb:1/44100 samplefmt:fltp samplerate:44100 chlayout:0x3f
[audio format for output stream 0:0 @ 0000000000548380] Setting 'sample_fmts' to value 's32'
[audio format for output stream 0:0 @ 0000000000548380] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_pan_0' and the filter 'audio format for output stream 0:0'
[AVFilterGraph @ 0000000000529960] query_formats: 4 queried, 6 merged, 3 already done, 0 delayed
[Parsed_pan_0 @ 0000000000546460] [SWR @ 0000000002dad1c0] Using fltp internally between filters
[Parsed_pan_0 @ 0000000000546460] o0 = 0.218 i0 + 0 i1 + 0.291 i2 + 0 i3 + 0.255 i4 + -0.236 i5
[Parsed_pan_0 @ 0000000000546460] o1 = 0 i0 + 0.218 i1 + 0.291 i2 + 0 i3 + -0.236 i4 + 0.255 i5
[auto-inserted resampler 0 @ 0000000000548840] [SWR @ 0000000002d98200] Using fltp internally between filters
[auto-inserted resampler 0 @ 0000000000548840] ch:2 chl:stereo fmt:fltp r:44100Hz -> ch:2 chl:stereo fmt:s32 r:44100Hz
Output #0, wav, to 'd:\method\audio.wav':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42isom
    ISFT            : Lavf57.55.100
    Stream #0:0(und), 0, 1/44100: Audio: pcm_s32le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s32, 2822 kb/s (default)
    Metadata:
      creation_time   : 2012-07-22T17:48:25.000000Z
      handler_name    : soun
      encoder         : Lavc57.63.103 pcm_s32le
Stream mapping:
  Stream #0:0 -> #0:0 (aac (native) -> pcm_s32le (native))
Press [q] to stop, [?] for help
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[aac @ 00000000005330c0] element type mismatch 3 != 0
[aac @ 00000000005330c0] skip 4096 / discard 0 samples due to side data
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[aac @ 00000000005330c0] element type mismatch 3 != 0
[aac @ 00000000005330c0] element type mismatch 3 != 0

(REMOVED LOTS OF REPEATED ERROR)

[aac @ 00000000005330c0] element type mismatch 3 != 0
[aac @ 00000000005330c0] element type mismatch 3 != 0
[output stream 0:0 @ 0000000000548100] EOF on sink link output stream 0:0:default.
No more output streams to write to, finishing.
size=   16032kB time=00:00:46.57 bitrate=2819.6kbits/s speed=47.8x    
video:0kB audio:16032kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000621%
Input file #0 (d:\other\musix\ChID-BLITS-EBU-Narration.mp4):
  Input stream #0:0 (audio): 1004 packets read (932536 bytes); 1002 frames decoded (2052096 samples); 
  Total: 1004 packets (932536 bytes) demuxed
Output file #0 (d:\method\audio.wav):
  Output stream #0:0 (audio): 1002 frames encoded (2052096 samples); 1002 packets muxed (16416768 bytes); 
  Total: 1002 packets (16416768 bytes) muxed
1002 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0000000002b90d60] Statistics: 4 seeks, 1005 writeouts
[AVIOContext @ 0000000000529220] Statistics: 937801 bytes read, 0 seeks
Again ffmpeg version N-81774-g64545dd works as expected:

Code: Select all

ffmpeg started on 2016-10-26 at 09:04:46
Report written to "ffmpeg-20161026-090446.log"
Command line:
"c:\\driver\\ffmpeg\\bin\\ffmpeg" -report -i "d:\\other\\musix\\ChID-BLITS-EBU-Narration.mp4" -c:a pcm_s32le -af "pan=2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL" "d:\\method\\audio.wav"
ffmpeg version N-81774-g64545dd Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.4.0 (GCC)
  configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
  libavutil      55. 30.100 / 55. 30.100
  libavcodec     57. 58.100 / 57. 58.100
  libavformat    57. 50.100 / 57. 50.100
  libavdevice    57.  0.102 / 57.  0.102
  libavfilter     6. 63.100 /  6. 63.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  1.100 /  2.  1.100
  libpostproc    54.  0.100 / 54.  0.100
Splitting the commandline.
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
Reading option '-i' ... matched as input file with argument 'd:\other\musix\ChID-BLITS-EBU-Narration.mp4'.
Reading option '-c:a' ... matched as option 'c' (codec name) with argument 'pcm_s32le'.
Reading option '-af' ... matched as option 'af' (set audio filters) with argument 'pan=2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL'.
Reading option 'd:\method\audio.wav' ... matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option report (generate a report) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input file d:\other\musix\ChID-BLITS-EBU-Narration.mp4.
Successfully parsed a group of options.
Opening an input file: d:\other\musix\ChID-BLITS-EBU-Narration.mp4.
[file @ 00000000004dec20] Setting default whitelist 'file,crypto'
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000004de460] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000004de460] ISO: File Type Major Brand: mp42
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000004de460] Unknown dref type 0x08206c7275 size 12
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000004de460] Processing st: 0, edit list 0 - media time: 3266, duration: 2051826
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000004de460] drop a frame at curr_cts: 0 @ 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000004de460] skip 1218 audio samples from curr_cts: 2048
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000004de460] Before avformat_find_stream_info() pos: 5288 bytes read:32768 seeks:0 nb_streams:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000004de460] demuxer injecting skip 1218 / discard 0
[aac @ 00000000004efc40] element type mismatch 3 != 0
[aac @ 00000000004efc40] skip 2436 / discard 0 samples due to side data
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000004de460] All info found
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000004de460] After avformat_find_stream_info() pos: 6216 bytes read:32768 seeks:0 frames:1
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'd:\other\musix\ChID-BLITS-EBU-Narration.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42isom
    creation_time   : 2012-07-22T17:48:25.000000Z
    encoder         : Fraunhofer IIS MPEG-4 Audio Encoder 03.02.11.01_MPEGScbr_SXPro
  Duration: 00:00:46.53, start: 0.027619, bitrate: 161 kb/s
    Stream #0:0(und), 1, 1/44100: Audio: aac (HE-AAC) (mp4a / 0x6134706D), 44100 Hz, 5.1, fltp, 159 kb/s (default)
    Metadata:
      creation_time   : 2012-07-22T17:48:25.000000Z
      handler_name    : soun
Successfully opened the file.
Parsing a group of options: output file d:\method\audio.wav.
Applying option c:a (codec name) with argument pcm_s32le.
Applying option af (set audio filters) with argument pan=2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL.
Successfully parsed a group of options.
Opening an output file: d:\method\audio.wav.
[file @ 0000000002a30dc0] Setting default whitelist 'file,crypto'
Successfully opened the file.
detected 2 logical cores
[Parsed_pan_0 @ 00000000004e1180] compat: called with args=[2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL]
[Parsed_pan_0 @ 00000000004e1180] Setting 'args' to value '2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL'
[graph 0 input from stream 0:0 @ 00000000004e19a0] Setting 'time_base' to value '1/44100'
[graph 0 input from stream 0:0 @ 00000000004e19a0] Setting 'sample_rate' to value '44100'
[graph 0 input from stream 0:0 @ 00000000004e19a0] Setting 'sample_fmt' to value 'fltp'
[graph 0 input from stream 0:0 @ 00000000004e19a0] Setting 'channel_layout' to value '0x3f'
[graph 0 input from stream 0:0 @ 00000000004e19a0] tb:1/44100 samplefmt:fltp samplerate:44100 chlayout:0x3f
[audio format for output stream 0:0 @ 00000000004e3600] Setting 'sample_fmts' to value 's32'
[audio format for output stream 0:0 @ 00000000004e3600] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_pan_0' and the filter 'audio format for output stream 0:0'
[AVFilterGraph @ 00000000004ddfc0] query_formats: 4 queried, 6 merged, 3 already done, 0 delayed
[Parsed_pan_0 @ 00000000004e1180] [SWR @ 0000000002c451c0] Using fltp internally between filters
[Parsed_pan_0 @ 00000000004e1180] o0 = 0.414 i0 + 0 i1 + 0.552 i2 + 0 i3 + 0.483 i4 + -0.448 i5
[Parsed_pan_0 @ 00000000004e1180] o1 = 0 i0 + 0.414 i1 + 0.552 i2 + 0 i3 + -0.448 i4 + 0.483 i5
[auto-inserted resampler 0 @ 00000000004e3a80] [SWR @ 0000000002c38200] Using fltp internally between filters
[auto-inserted resampler 0 @ 00000000004e3a80] ch:2 chl:stereo fmt:fltp r:44100Hz -> ch:2 chl:stereo fmt:s32 r:44100Hz
Output #0, wav, to 'd:\method\audio.wav':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42isom
    ISFT            : Lavf57.50.100
    Stream #0:0(und), 0, 1/44100: Audio: pcm_s32le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s32, 2822 kb/s (default)
    Metadata:
      creation_time   : 2012-07-22T17:48:25.000000Z
      handler_name    : soun
      encoder         : Lavc57.58.100 pcm_s32le
Stream mapping:
  Stream #0:0 -> #0:0 (aac (native) -> pcm_s32le (native))
Press [q] to stop, [?] for help
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[aac @ 00000000004f9700] element type mismatch 3 != 0
[aac @ 00000000004f9700] skip 2436 / discard 0 samples due to side data
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[aac @ 00000000004f9700] element type mismatch 3 != 0
[aac @ 00000000004f9700] skip whole frame, skip left: 388
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[aac @ 00000000004f9700] element type mismatch 3 != 0
[aac @ 00000000004f9700] skip 388/2048 samples
[aac @ 00000000004f9700] element type mismatch 3 != 0
[aac @ 00000000004f9700] element type mismatch 3 != 0

(REMOVED LOTS OF REPEATED ERROR)

[aac @ 00000000004f9700] element type mismatch 3 != 0
[aac @ 00000000004f9700] element type mismatch 3 != 0
[output stream 0:0 @ 00000000004e3380] EOF on sink link output stream 0:0:default.
No more output streams to write to, finishing.
size=   16029kB time=00:00:46.52 bitrate=2822.4kbits/s speed=45.9x    
video:0kB audio:16029kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000621%
Input file #0 (d:\other\musix\ChID-BLITS-EBU-Narration.mp4):
  Input stream #0:0 (audio): 1004 packets read (932536 bytes); 1002 frames decoded (2051708 samples); 
  Total: 1004 packets (932536 bytes) demuxed
Output file #0 (d:\method\audio.wav):
  Output stream #0:0 (audio): 1002 frames encoded (2051708 samples); 1002 packets muxed (16413664 bytes); 
  Total: 1002 packets (16413664 bytes) muxed
1002 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0000000002a30ec0] Statistics: 4 seeks, 1005 writeouts
[AVIOContext @ 00000000004e6e00] Statistics: 937801 bytes read, 0 seeks
Thanks for your reply.

llogan
Posts: 332
Joined: Fri Mar 14, 2014 3:29 am

Re: af pan returns empty/silent wav

Post by llogan » Wed Oct 26, 2016 6:47 pm

I still can't duplicate the issue (but I never tried your exact version). Works for me. Plays fine in ffplay and aplay (on Linux). Update your ffmpeg.

Code: Select all

$ ./ffmpeg -y -i ../ChID-BLITS-EBU-Narration.mp4 -c:a pcm_s32le -af "pan=2c|FL<0.6*FL+0.8*FC+0.7*SL+-0.65*SR+0.7*BL+-0.65*BR|FR<0.6*FR+0.8*FC+-0.65*SL+0.7*SR+0.7*BR+-0.65*BL" ../output.wav
ffmpeg version N-82132-g38e5a4f Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 6.2.1 (GCC) 20160830
  configuration: 
  libavutil      55. 33.100 / 55. 33.100
  libavcodec     57. 63.103 / 57. 63.103
  libavformat    57. 55.100 / 57. 55.100
  libavdevice    57.  0.103 / 57.  0.103
  libavfilter     6. 64.100 /  6. 64.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  2.100 /  2.  2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '../ChID-BLITS-EBU-Narration.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42isom
    creation_time   : 2012-07-22T17:48:25.000000Z
    encoder         : Fraunhofer IIS MPEG-4 Audio Encoder 03.02.11.01_MPEGScbr_SXPro
  Duration: 00:00:46.53, start: -0.027619, bitrate: 161 kb/s
    Stream #0:0(und): Audio: aac (HE-AAC) (mp4a / 0x6134706D), 44100 Hz, 5.1, fltp, 159 kb/s (default)
    Metadata:
      creation_time   : 2012-07-22T17:48:25.000000Z
      handler_name    : soun
Output #0, wav, to '../output.wav':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42isom
    ISFT            : Lavf57.55.100
    Stream #0:0(und): Audio: pcm_s32le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s32, 2822 kb/s (default)
    Metadata:
      creation_time   : 2012-07-22T17:48:25.000000Z
      handler_name    : soun
      encoder         : Lavc57.63.103 pcm_s32le
Stream mapping:
  Stream #0:0 -> #0:0 (aac (native) -> pcm_s32le (native))
Press [q] to stop, [?] for help
size=   16032kB time=00:00:46.57 bitrate=2819.6kbits/s speed= 158x    
video:0kB audio:16032kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000621%

testuser31
Posts: 3
Joined: Wed Oct 19, 2016 1:58 pm

Re: af pan returns empty/silent wav

Post by testuser31 » Thu Oct 27, 2016 7:05 am

Problem now resolved with ffmpeg version N-82143-gbf14393.

Thanks.

Post Reply
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