Re: [Gopchop-devel] newbie problems

[Tomi O. <tom...@ik...>]

Tuesday May 25 11:37:00 +0200 2004 Edmund Mergl <e....@ba...> wrote:
> Kees Cook wrote:
> 
> neither mplex nor replex work.
> 
> mplex:
>    Scanning audio stream for access units information
>    Error in MPEG stream at offset (bits) 6688437: supposed marker bit not found.
> 
> replex:
>    ringbuffer overflow 734<2032 6291456
>    video ring buffer overrun error
> 
> As Marcus Metzler - the author of mplex/replex - pointed out,
> this might be a general problem of many tools: they assume
> the file to be homogenous.

The mplex you were using was dvb-mplex (from libdvb/dvb-mpegtools)
and not mplex from mjpegtools I presume...

... and that video ring buffer overrun error is not caused by
video "pid" being different than e0 (or you were using -v 0xe[0-9a-f])
if video PS id was different (I usually need to give -v 0xea in
my replex command line)

> 
> The main part of my mpeg-file is black&white and mono.
> The beginning and the end, which I would like to cut off,
> are color and stereo. mplex, replex and transcode have
> problems exactly at that point, where the black&white
> part starts.

Hmm, what if you do 
"tail +6688439 <yourfile> | replex <replexopts> -o out.mpg"
... or give even greater than 6688439... When replex again
fails (going from color to b&w) you probably have enough
input material for transcoding then (if that even works)?

> mplayer is the only tool I found, which does not fail.

Have you tried mplayer as input module for transcode
-- or have you got everything you wanted encoded using
mencoder (If you even wanted to encode...).

> 
> Edmund


Tomi