[FFmpeg-trac] #2592(avcodec:open): Bug with b-frames?

[FFmpeg]

#2592: Bug with b-frames?
------------------------------------+-----------------------------------
             Reporter:  microchip   |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  important   |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  regression  |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  0           |
------------------------------------+-----------------------------------
Changes (by cehoyos):

 * status:  new => open
 * reproduced:  0 => 1


Comment:

 Also reproducible with mpeg4:
 {{{
 $ ffmpeg -i fate_suite/svq3/Vertical400kbit.sorenson3.mov -an -bf 2 -vb
 400k -pass 1 out.avi

 ...

 $ ffmpeg -i fate_suite/svq3/Vertical400kbit.sorenson3.mov -an -bf 2 -vb
 400k -pass 2 -y out.avi
 ffmpeg version N-53363-g1fded9b Copyright (c) 2000-2013 the FFmpeg
 developers
   built on May 23 2013 11:05:47 with gcc 4.6 (Ubuntu/Linaro
 4.6.3-1ubuntu5)
   configuration: --enable-gpl
   libavutil      52. 33.100 / 52. 33.100
   libavcodec     55. 10.101 / 55. 10.101
   libavformat    55.  7.100 / 55.  7.100
   libavdevice    55.  1.101 / 55.  1.101
   libavfilter     3. 69.100 /  3. 69.100
   libswscale      2.  3.100 /  2.  3.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  3.100 / 52.  3.100
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x2e53a80] max_analyze_duration 5000000 reached
 at 5000998 microseconds
 Guessed Channel Layout for  Input Stream #0.1 : mono
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
 'fate_suite/svq3/Vertical400kbit.sorenson3.mov':
   Metadata:
     creation_time   : 2001-03-20 16:17:18
     title           : Vertical Online SV3 Demo
     title-eng       : Vertical Online SV3 Demo
     artist          : Logan Kelsey
     artist-eng      : Logan Kelsey
     copyright       : © Vertical Online 2001
     copyright-eng   : © Vertical Online 2001
     encoder         : Sorenson Video 3
     encoder-eng     : Sorenson Video 3
   Duration: 00:00:43.58, start: 0.000000, bitrate: 580 kb/s
     Stream #0:0(eng): Video: svq3 (SVQ3 / 0x33515653), yuvj420p, 320x240,
 391 kb/s, 30.02 fps, 30 tbr, 600 tbn, 600 tbc
     Metadata:
       creation_time   : 2001-03-20 16:17:18
       handler_name    : Apple Alias Data Handler
     Stream #0:1(eng): Audio: adpcm_ima_qt (ima4 / 0x34616D69), 44100 Hz,
 mono, s16p, 176 kb/s
     Metadata:
       creation_time   : 2001-03-20 16:17:18
       handler_name    : Apple Alias Data Handler
 Output #0, avi, to 'out.avi':
   Metadata:
     encoder-eng     : Sorenson Video 3
     INAM            : Vertical Online SV3 Demo
     title-eng       : Vertical Online SV3 Demo
     IART            : Logan Kelsey
     artist-eng      : Logan Kelsey
     ICOP            : © Vertical Online 2001
     copyright-eng   : © Vertical Online 2001
     ISFT            : Lavf55.7.100
     Stream #0:0(eng): Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 320x240,
 q=2-31, pass 2, 400 kb/s, 30 tbn, 30 tbc
     Metadata:
       creation_time   : 2001-03-20 16:17:18
       handler_name    : Apple Alias Data Handler
 Stream mapping:
   Stream #0:0 -> #0:0 (svq3 -> mpeg4)
 Press [q] to stop, [?] for help
 frame= 1308 fps=247 q=0.0 Lsize=    2247kB time=00:00:43.56 bitrate=
 422.6kbits/s
 video:2211kB audio:0kB subtitle:0 global headers:0kB muxing overhead
 1.669231%
 }}}
 The output file contains no b-frames, if ''-vb 400k'' is omitted, encoding
 fails which is also a regression.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2592#comment:4>
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