Search found 200 matches

by pandy
Mon Jul 01, 2019 7:33 pm
Forum: Usage
Topic: Grabbing and realtime conversion of network file/stream
Replies: 5
Views: 575

Re: Grabbing and realtime conversion of network file/stream

Under DOS you should avoid spaces in paths... this doesn't work well since MSDOS times...
by pandy
Mon Jul 01, 2019 7:31 pm
Forum: Usage
Topic: hevc_qsv producing empty file
Replies: 3
Views: 496

Re: hevc_qsv producing empty file

Over 26 months ago this worked for me:

Code: Select all

-c:v hevc_qsv -preset:v 7 -profile:v 1 -load_plugin 2 -level:v 5.1 -b:v 38M -maxrate:v 40M-1 -minrate:v 1M -bufsize:v 19M-1 -qmin:v 4 -qmax:v 69 -g:v 250 -bf:v 3 -refs:v 5 -bitrate_limit 1 -async_depth 4
It may not work today...
by pandy
Mon Jul 01, 2019 7:22 pm
Forum: Usage
Topic: NEED help w/ interlaced to interlaced transcoding
Replies: 1
Views: 247

Re: NEED help w/ interlaced to interlaced transcoding

Use bitstream fiter https://ffmpeg.org/ffmpeg-bitstream-fil ... 5fmetadata or other VUI/SEI modifier to change (add) proper colour space (avoid transcoding).
by pandy
Mon Jul 01, 2019 7:19 pm
Forum: Usage
Topic: HEVC_QSV: Unsupported pixel format: bgra
Replies: 1
Views: 306

Re: HEVC_QSV: Unsupported pixel format: bgra

Code: Select all

ffmpeg -h encoder=hevc_qsv >hevc_qsv.txt
Check codec supported pixel formats, if necessary provide conversion (don't rely on automatic swscale conversion).
by pandy
Mon Jul 01, 2019 7:15 pm
Forum: Usage
Topic: showspectrumpic and background color
Replies: 5
Views: 667

Re: showspectrumpic and background color

I don't understand your question, try to rephrase your question. Perhaps simple steps or some picture, provide your script code etc.
by pandy
Mon Jul 01, 2019 7:13 pm
Forum: Usage
Topic: Apply BiQuad filter to wav at certian timespans
Replies: 12
Views: 1237

Re: Apply BiQuad filter to wav at certian timespans

Can't check - no timeline in my ffmpeg version ( a bit old but supporting fdkaac and can't compile anything new under https://github.com/jb-alvarado/media-autobuild_suite ) and Your suite https://github.com/rdp/ffmpeg-windows-build-helpers don't work to me either...
by pandy
Mon Jul 01, 2019 7:08 pm
Forum: Usage
Topic: Need recommendation on Video Conversion
Replies: 8
Views: 580

Re: Need recommendation on Video Conversion

Use MP4 container with video codec H.264 and if possible keep original AC-3 audio track audio, for H.264 use CFR type encoding with sufficiently low CFR (lower = higher quality) - i would say something like CFR=12...16.
by pandy
Mon Jul 01, 2019 6:59 pm
Forum: Usage
Topic: ffplay on webcam
Replies: 1
Views: 258

Re: ffplay on webcam

If from some reason ffplay don't work you can always PIPE from ffmpeg to ffplay. Use NUT format to provide painless functionality.

Code: Select all

-f NUT - | ffplay.exe -autoexit -i - 
Should work
by pandy
Thu Jun 06, 2019 5:22 pm
Forum: Usage
Topic: Apply BiQuad filter to wav at certian timespans
Replies: 12
Views: 1237

Re: Apply BiQuad filter to wav at certian timespans

richardpl wrote:
Wed Jun 05, 2019 8:05 am
Biquad filter support timeline, but you need recent ffmpeg.
Are you sure? https://ffmpeg.org/ffmpeg-filters.html#biquad no trace on this in official documentation.

Btw thanks for sofalizer and for other useful things!
by pandy
Thu Jun 06, 2019 5:20 pm
Forum: Usage
Topic: animated webp with alpha channel
Replies: 3
Views: 819

Re: animated webp with alpha channel

Perhaps using only Intra (and perhaps single P) frames (e.g. IIIII or IPIPIPIP), short and closed GOP?
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