[FFmpeg-user] Problems with Select Filter

Paul B Mahol onemda at gmail.com
Sat Aug 17 16:01:26 CEST 2013

On 8/17/13, James Board <jpboard2 at yahoo.com> wrote:
> I captured a video file in raw format ('mplayer -identify' says the format
> is:
> [rawuyvy] vfm: raw (RAW UYVY)).  Then I did some cut edits with ffmpeg
> using
> the 'Select' video filter, and at the same time set the output codec to
> ffvhuff.  The problem is that those cut edits were not at the exact frames
> I
> specified with the 'Select' video filter.  When I play the video, the cuts
> happen at the wrong places (mostly towards the end of the file).
> I'm trying to figure out why this occurs.  When I try to play the edited
> file
> with mplayer, it displays these complaints:
>     AVI: ODML: Building ODML index (2 superindexchunks).
>     AVI: ODML: Broken (incomplete?) file detected. Will use traditional
> index.
>     AVI: Generated index table for 10983 chunks!
> Does that help identify the problem?

Do not use avi.

> However, if I first compress the raw video file with ffvhuff codec, save
> that
> to an intermediate file, and then apply the same exact edits with the
> Select
> filter to the ffvhuff-compressed file, then the file is edited correctly,
> and
> I don't see the above ODML error message.
> I want to figure this problem out so I don't inadvertantly reproduce it,
> but not notice the incorrect edits until long after the source material
> is deleted.  What is the problem?
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