Search found 51 matches

by navilor
Fri Jul 05, 2019 2:50 am
Forum: Usage
Topic: Need recommendation on Video Conversion
Replies: 8
Views: 707

Re: Need recommendation on Video Conversion

I have been in the streaming media industry since 2008. I am well versed in the usage of FFmpeg so much so that I felt compelled to write an article to debunk bad information regarding how to use FFmpeg to create streaming media compliant video. That article can be found at the link below. https://v...
by navilor
Thu Jul 04, 2019 7:15 pm
Forum: Compiling
Topic: Convert mp4 video file with audio of pcm_alaw, 8000Hz, mono, s16, 64 kb/s to good mp4
Replies: 2
Views: 468

Re: Convert mp4 video file with audio of pcm_alaw, 8000Hz, mono, s16, 64 kb/s to good mp4

The video does not start on a keyframe. This is not uncommon when converting random content. It is likely that the person who created that video used the -noaccurate_seek option to dump out the content. They could have used an accurate seek. https://trac.ffmpeg.org/wiki/Seeking Once of the nice thin...
by navilor
Sat May 11, 2019 6:56 am
Forum: Compiling
Topic: Build steps to reproduce Zeranoe ffmpeg builds?
Replies: 14
Views: 2112

Re: Build steps to reproduce Zeranoe ffmpeg builds?

Thank you hydra. :-) I've tried both of those. The one by DeadSix is really nice actually. And they're close to reproducing the Zeranoe builds, but something is off. Specifically, in my case, I get a "RTMP_Connect1, TLS_Connect failed" when I try livestreaming to an rtmps endpoint. So something is ...
by navilor
Fri May 03, 2019 3:45 pm
Forum: Suggestions
Topic: VMAF Filter
Replies: 9
Views: 7037

Re: VMAF Filter

Is there other implementations of VMAF? Is there open specification how to do VMAF? VMAF is open source and can be found on github. It can be compiled on it's own. Note that compiling it on Windows with Visual Studio created a broken build the last time I tried. https://github.com/Netflix/vmaf Micr...
by navilor
Wed May 01, 2019 3:28 pm
Forum: Suggestions
Topic: VMAF Filter
Replies: 9
Views: 7037

Re: VMAF Filter

VMAF is just trend, not reality. Either you are trolling people or you are not in the streaming media industry. I started my career in streaming media back in 2008 at RealNetworks and cut my teeth on the RTSP protocol. The single most commonly asked question in streaming media is what bitrate shoul...
by navilor
Sun Jan 07, 2018 9:24 pm
Forum: Usage
Topic: FFmpeg transfer from bad media
Replies: 4
Views: 1219

Re: FFmpeg transfer from bad media

Demux the video then demux the audio to see if one or both are broken. ffmpeg -i H:\badfile.mp4 -vcodec copy -an e:\video.mp4 ffmpeg -i H:\badfile.mp4 -vn -acodec copy e:\audio.mp4 In a perfect world this is merely a PTS/DTS corruption issue and you can put everything back together. ffmpeg -i e:\vid...
by navilor
Sun Jan 07, 2018 8:17 pm
Forum: Suggestions
Topic: VMAF Filter
Replies: 9
Views: 7037

Re: VMAF Filter

This lib currently depends on pthread, which is not included with the builds right now. I'm trying to avoid adding pthread support because it's slower than FFmpeg's Windows threading implementation. Pthreads are required if you ingest UDP packets typically coming from live RTP, RTSP, or MPEG-TS fee...
by navilor
Mon Nov 13, 2017 1:48 am
Forum: Usage
Topic: Live streaming
Replies: 1
Views: 1089

Re: Live streaming

It looks like you are having a problem decoding that content. The content may be bad. I never trust any content that comes across my desk. An early FFmpeg ticket agrees with this. https://trac.ffmpeg.org/ticket/19 Another post on a different website also shows the same errors you have. https://forum...
by navilor
Sun Nov 12, 2017 9:01 am
Forum: Usage
Topic: How do I dump a network stream to a file?
Replies: 8
Views: 4713

Re: How do I dump a network stream to a file?

So basically you want an exact copy of the audio and video stream with the PTS/DTS timestamps kept the same, the metadata kept intact, and no additional data added such as writing application added to the output. A literal binary copy. Too bad FTP, SFTP, and HTTP are not options here. You might be i...
by navilor
Sun Nov 12, 2017 6:05 am
Forum: Usage
Topic: How do I dump a network stream to a file?
Replies: 8
Views: 4713

Re: How do I dump a network stream to a file?

I have a cheap RTSP camera and this worked for me once I forced the output container to be asf using the -f option. I had to exclude the audio because the asf container apparently does not like the A-law (also known as G.711pcma_law) codec. The video codec is H.264. ffmpeg -rtsp_transport -tcp -i rt...
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