[FFmpeg-trac] #128(undetermined:new): svq1 decoder is somehow buggy

[FFmpeg]

#128: svq1 decoder is somehow buggy
--------------------------+--------------------------
 Reporter:  ami_stuff     |        Type:  defect
   Status:  new           |    Priority:  normal
Component:  undetermined  |     Version:  unspecified
 Keywords:                |  Blocked By:
 Blocking:                |  Reproduced:  0
 Analyzed:  0             |
--------------------------+--------------------------
 ftp://ftp.pigwa.net/stuff/other/vcsclip.mov

 please compare attached screenshot (left = ffplay / right = qt player)

 I found this with google, maybe related?

 > [Ffmpeg-user] A small but disastrous bug in SVQ1 Decoder
 >
 > Hi, I am using ffmpeg repository source code for developing Sorenson
 > decoder and encountered a "break" statement missing in
 > "avcodec_align_dimensions()" function under "switch case
 > PIX_FMT_YUV410P" in file "utils.c". Due to this every time when
 > controls come to "case PIX_FMT_YUV410P" instead of breaking after
 > executing the required commands, it goes to the default case and
 > reset the values of w_align & h_align to 1. Which eventually change
 > the file size of output yuv file, resulting in corrupted output.
 >
 >
 > Please add the necessary "break" statement in appropriate switch case
 > in the new version.


 {{{
 C:\>ffmpeg -i C:\vcsclip.mov
 FFmpeg version git-N-29181-ga304071, Copyright (c) 2000-2011 the FFmpeg
 develope
 rs
   built on Apr 18 2011 21:24:03 with gcc 4.5.2
   configuration: --enable-gpl --enable-version3 --enable-runtime-cpudetect
 --ena
 ble-memalign-hack --enable-avisynth --enable-bzlib --enable-frei0r
 --enable-libo
 pencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-
 libgsm --
 enable-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-
 libschroedinger
  --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx
 --enabl
 e-libx264 --enable-libxavs --enable-libxvid --enable-zlib --cross-
 prefix=i686-w6
 4-mingw32- --target-os=mingw32 --arch=x86_32 --extra-
 cflags=-I/home/kyle/softwar
 e/ffmpeg/external-libraries/win32/include --extra-
 ldflags=-L/home/kyle/software/
 ffmpeg/external-libraries/win32/lib --pkg-config=pkg-config
   libavutil    50. 40. 1 / 50. 40. 1
   libavcodec   52.120. 0 / 52.120. 0
   libavformat  52.108. 0 / 52.108. 0
   libavdevice  52.  4. 0 / 52.  4. 0
   libavfilter   1. 79. 0 /  1. 79. 0
   libswscale    0. 13. 0 /  0. 13. 0
 [mov,mp4,m4a,3gp,3g2,mj2 @ 01CEC000] max_analyze_duration reached

 Seems stream 0 codec frame rate differs from container frame rate: 600.00
 (600/1
 ) -> 12.00 (12/1)
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\vcsclip.mov':
   Metadata:
     creation_time   : 2000-08-17 00:28:08
     album           : Digital 2600
     album-eng       : Digital 2600
     artist          : Kevin Rodgers & Markus Karlus
     artist-eng      : Kevin Rodgers & Markus Karlus
     copyright-eng   : [C] 2000
     comment         : goldenshower at uia.com.br ]]]] www.goldenshower.gs
     copyright       : [C] 2000
     comment-eng     : goldenshower at uia.com.br ]]]] www.goldenshower.gs
   Duration: 00:02:52.53, start: 0.000000, bitrate: 338 kb/s
     Stream #0.0(eng): Video: svq1, yuv410p, 320x240, 289 kb/s, 12 fps, 12
 tbr, 6
 00 tbn, 600 tbc
     Metadata:
       creation_time   : 2000-08-17 00:28:08
     Stream #0.1(eng): Audio: qdm2, 44100 Hz, 1 channels, s16, 48 kb/s
     Metadata:
       creation_time   : 2000-08-17 00:28:08
 At least one output file must be specified
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/128>
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