[FFmpeg-user] FFv1: newer ffmpeg builds create larger files?

Michael Niedermayer michaelni at gmx.at
Mon Jun 4 00:59:55 CEST 2012

On Sun, Jun 03, 2012 at 02:28:12PM +0200, Peter B. wrote:
> I'm currently testing FFv1.3, and during these tests I saw that even if
> I transcoded ffv1->ffv1 with "-level 1", the resulting files were bigger
> than the original FFv1 input file created with an old version of
> ffdshow-tryouts (Lavf52.111.0)
> Example:
> "original.avi" (encoded in realtime using Virtualdub + ffdshow-tryouts):
> 452433486 Bytes
> Transcoded:
> "$ffmpeg -i original.avi -acodec copy -vcodec ffv1 -level 1 -g 1"
> 473632234 Bytes
> This is is almost 20 MB more per-minute than the old "original.avi",
> although both are encoded using with FFv1.1.
> Is there any explanation for this?

> ...and do I have any possibility to verify/check/see the ffv1-parameters
> the original file actually has? Maybe it has a GOP>1 and I'm not aware
> of it?

you can see some information on the used parameters with -debug 1
the latest git shows a bit more than older versions

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Observe your enemies, for they first find out your faults. -- Antisthenes
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