[MPlayer-users] [BUG?] Libavcodec first pass fail with Mulholland drive : get_buffer() failed NOVIRUS

[Fabio Papa]

On Monday 22 September 2003 13:09, Eric Fernandez wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> I have a strange case with a specific DVD : Mulholland Drive Region 1,
> and it may reveal a bug.
>
> Encoding the movie (title 1) or the trailer (title 6) fails after the
> first pass using mencoder 1.0pre1 but was successful with previous
> versions of mencoder (0.91 and below).
>
> Now, at the end of the first pass, mencoder returns (this is obtained
> with the trailer, title 6) :
>
> Movie-Aspect is 1,33:1 - prescaling to correct movie aspect.
> get_buffer() failed (0 -2546 0 0x40fa0030)
>
> and the second pass fails immediately. Interestingly, if I interrupt
> with escape the first pass before the end, it works.
> The trailer is 2549 frames long, and the error says get_buffer() failed
> (0 -2546 0 0x40fa0030), I guess the problem is at frame 2546.
>
> I used the classical 2-pass strategy :
>
> mencoder -oac copy -o /dev/null -ovc lavc -lavcopts
> vcodec=mpeg4:vbitrate=850:vhq:vpass=1 -vop scale=640:480 -ofps 23.976
> -sws 2
> mencoder -oac copy -o md.avi -ovc lavc -lavcopts
> vcodec=mpeg4:vbitrate=850:vhq:vpass=2 -vop scale=640:480 -ofps 23.976
> -sws 2
>
> I tried also using all libavc options by default, still the same
> (removing ofps or sws options)
>
> However :
> - mencoder 0.91 was working
> - mencoder 1.0pre1 works perfectly using xvid.
> - my other region 1 DVD encode correctly using 1.0pre1 and libavcodec
> Interestingly, dvdrip works with ffmpeg and mulholland drive trailer. It
> uses transcode to encode video.
> So I guess the error is specific to the way mencoder handles ffmpeg, but
> occurs only with Mulholland drive !
>
> Anyone saw such problem before, has anyone got that DVD to confirm ? Is
> there a workaround ? Is it a bug introduced since MPlayer 0.90 ?
> Thanks.
I saw something before, which was related to mpeg12 decoder, but was since 
resolved. Anyway, you could try specifying -vc ffmpeg2 to use ffmpeg mpeg2 
decoder, to see if helps.

>
> Eric
>
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-- 
Fabio Papa
Engineering division
Machining Centers Manufacturing S.p.A.
viale F. e G. Celaschi 19 - Vigolzone (PC) Italy