[Ffmpeg-devel] bug report: conversion-time issues

[Christopher Halse Rogers]

On 10/15/06, Projectshifter <projectshifter at gmail.com> wrote:
> The server I'm installing FFmpeg runs CentOS (yuk!), but it was recently
> redone.  It had 2 different versions off ffmpeg in the beginning, one that I
> personally patched to allow all wmv formats, and then one from you guys
> after the main version was patched, and it was running fine.  They redid the
> OS and reinstalled the services, and that's when problems started
> happening.  A few days ago there was a problem with configure not
> succeeding, but I waited 24 hours and got the new version off of subversion
> and it worked fine.  Everything compiles just fine if I use the latest
> version, or the one I downloaded a couple weeks ago that supported wmv
> formats natively.  The one I patched doesn't compile properly, I know it's
> an ld problem and I'd rather not mess with it when I'd rather have a version
> that has it natively supported.  The conversion process succeeds (through
> exec()'ing a bash file that handles it in PHP), but the videos came out
> choppy on the current version.  The videos seem to suceed and come out more
> or less fine with the version I've got two weeks ago.  I've tried several
> command line options, the usual is just "ffmpeg -i input.wmv -f flv -s
> 320x240 -sameq output.flv", but the bash file that php calls to is just
> "ffmpeg -i $1 -ar 22050 -ab 32 -s 320x240 -b 512 -f flv $2"  It happens more

There is at least 1 problem here.  The units of the -b flag has
recently changed; it's now bits/sec, so that command line is asking
FFmpeg to produce an output with a bitrate of 512 bits/sec, which
obviously won't be very good quality.  You now want to use -b 512k to
indicate 512 kilobits/sec, which is what you're after.

> or less on every file that I've tested with.  I tried it with gdb and it
> says that the program exits normally, which explains why it produces regular
> files, but the output of ffmpeg is as follows:
> [root at mercury temp]# x_convertmovie d32ea029c12ac6aa9e1380a720e818e7.WMV
> test6.flv
> FFmpeg version SVN-r6229, Copyright (c) 2000-2004 Fabrice Bellard
>   configuration:  --enable-static --enable-mp3lame
>   libavutil version: 49.0.0
>   libavcodec version: 51.14.0
>   libavformat version: 50.5.0
>   built on Oct 13 2006 19:16:54, gcc: 3.4.6 20060404 (Red Hat 3.4.6-3)
>
> Seems that stream 0 comes from film source: 1000.00 (1000/1) -> 25.00 (25/1)
> Input #0, asf, from 'd32ea029c12ac6aa9e1380a720e818e7.WMV':
>   Duration: 00:01:24.4, start: 2.000000, bitrate: 454 kb/s
>   Stream #0.0: Video: msmpeg4v2, yuv420p, 320x240, 25.00 fps(r)
>   Stream #0.1: Audio: mp3, 22050 Hz, stereo, 64 kb/s
> Output #0, flv, to 'test6.flv':
>   Stream #0.0: Video: flv, yuv420p, 320x240, q=2-31, 512 kb/s, 25.00 fps(c)
>   Stream #0.1: Audio: mp3, 22050 Hz, stereo, 32 kb/s
> Stream mapping:
>   Stream #0.0 -> #0.0
>   Stream #0.1 -> #0.1
> Press [q] to stop encoding
> [msmpeg4v2 @ 0x86d7a0]cbpy 1 invalid at 16 14
> [msmpeg4v2 @ 0x86d7a0]Error at MB: 310
> [msmpeg4v2 @ 0x86d7a0]concealing 300 DC, 300 AC, 300 MV errors
> [msmpeg4v2 @ 0x86d7a0]cbpy 1 invalid at 16 14
> [msmpeg4v2 @ 0x86d7a0]Error at MB: 310
> [msmpeg4v2 @ 0x86d7a0]concealing 300 DC, 300 AC, 300 MV errors
> overread, skip -6 enddists: -4 -4 time=9.5 bitrate= 223.1kbits/s
> [msmpeg4v2 @ 0x86d7a0]cbpy 1 invalid at 8 14
> [msmpeg4v2 @ 0x86d7a0]Error at MB: 302
> [msmpeg4v2 @ 0x86d7a0]concealing 300 DC, 300 AC, 300 MV errors
> [msmpeg4v2 @ 0x86d7a0]cbpy 1 invalid at 19 14itrate= 268.6kbits/s
> [msmpeg4v2 @ 0x86d7a0]Error at MB: 313
> [msmpeg4v2 @ 0x86d7a0]concealing 154 DC, 154 AC, 154 MV errors
> invalid new backstep 188   1047kB time=26.2 bitrate= 327.0kbits/s
> [msmpeg4v2 @ 0x86d7a0]cbpy 1 invalid at 12 14
> [msmpeg4v2 @ 0x86d7a0]Error at MB: 306
> [msmpeg4v2 @ 0x86d7a0]concealing 76 DC, 76 AC, 76 MV errors
> [msmpeg4v2 @ 0x86d7a0]cbpy 1 invalid at 15 14
> [msmpeg4v2 @ 0x86d7a0]Error at MB: 309
> [msmpeg4v2 @ 0x86d7a0]concealing 300 DC, 300 AC, 300 MV errors
> overread, skip -6 enddists: -5 -5 time=40.3 bitrate= 470.8kbits/s
> [msmpeg4v2 @ 0x86d7a0]cbpy 1 invalid at 17 14
> [msmpeg4v2 @ 0x86d7a0]Error at MB: 311
> [msmpeg4v2 @ 0x86d7a0]concealing 300 DC, 300 AC, 300 MV errors
> overread, skip -10 enddists: -1 -1time=47.4 bitrate= 516.1kbits/s
> [msmpeg4v2 @ 0x86d7a0]cbpy 1 invalid at 19 14
> [msmpeg4v2 @ 0x86d7a0]Error at MB: 313
> [msmpeg4v2 @ 0x86d7a0]concealing 300 DC, 300 AC, 300 MV errors
> [msmpeg4v2 @ 0x86d7a0]cbpy 1 invalid at 16 14itrate= 592.5kbits/s
> [msmpeg4v2 @ 0x86d7a0]Error at MB: 310
> [msmpeg4v2 @ 0x86d7a0]concealing 300 DC, 300 AC, 300 MV errors
> overread, skip -6 enddists: -5 -5 time=69.1 bitrate= 586.7kbits/s
> [msmpeg4v2 @ 0x86d7a0]cbpy 1 invalid at 17 14itrate= 583.0kbits/s
> [msmpeg4v2 @ 0x86d7a0]Error at MB: 311
> [msmpeg4v2 @ 0x86d7a0]concealing 218 DC, 218 AC, 218 MV errors

Those look like your input file is broken in some way.  Does it happen
for all input files?