[FFmpeg-user] Poor quality output when converting avi to mp4
gyandoshi at gmail.com
Mon Jul 24 22:57:30 EEST 2017
On Tue, Jul 25, 2017 at 1:10 AM, Ute Willmore <uwillmore at remotegeo.com>
> What is non-standard about my input video?
That I don't know. Only that ffmpeg doesn't decode most of the frames from
the original file.
> I ran many conversion commands, and listed several of them in my original
> message. Which one did you use?
'ffmpeg -v verbose -i hd.avi -vf scale=640:480 scaledoutput.mp4'
What does "Muxing to TS" mean and why/how did you do that? What does
> "Invalid NAL warnings mean?
H.264 data is stored in chunks called NAL units. I transferred the contents
to another container format just to test the result, so you can ignore this
> Is this the one you are using?
Yes, but this is the download page at the official site:
mp4box is one of the tools bundled.
> Do you have any idea what needs to be done to
> produce a standard avi video in the first place?
How are these AVIs produced?
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