[FFmpeg-trac] #491(FFmpeg:new): ffmpeg's -b option (bitrate) overrides audio bitrate

[FFmpeg]

#491: ffmpeg's -b option (bitrate) overrides audio bitrate
-------------------------------------+-----------------------------------
             Reporter:  jbm          |                    Owner:  michael
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  FFmpeg
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-----------------------------------

Comment (by jbm):

 Sorry, here is the complete output:

 ffmpeg -i 00006.MTS -b 2000k test.mpg
 ffmpeg version N-32732-g7491816, Copyright (c) 2000-2011 the FFmpeg
 developers
   built on Sep 20 2011 12:11:56 with gcc 4.6.1
   configuration: --prefix=/usr --enable-shared --enable-libmp3lame
 --enable-gpl --enable-libfaac --enable-libvorbis --enable-pthreads
 --enable-libfaac --enable-libxvid --enable-x11grab --enable-libgsm
 --enable-libx264 --enable-libtheora --enable-libdc1394 --enable-nonfree
 --disable-stripping --enable-avfilter --enable-libschroedinger --enable-
 libopencore-amrnb --enable-libopencore-amrwb --enable-version3
   libavutil    51. 16. 1 / 51. 16. 1
   libavcodec   53. 16. 0 / 53. 16. 0
   libavformat  53. 12. 0 / 53. 12. 0
   libavdevice  53.  4. 0 / 53.  4. 0
   libavfilter   2. 43. 2 /  2. 43. 2
   libswscale    2.  1. 0 /  2.  1. 0
   libpostproc  51.  2. 0 / 51.  2. 0
 [mpegts @ 0x99beac0] parser not found for codec hdmv_pgs_subtitle, packets
 or times may be invalid.

 Seems stream 0 codec frame rate differs from container frame rate: 50.00
 (50/1) -> 50.00 (50/1)
 Input #0, mpegts, from '00006.MTS':
   Duration: 00:00:34.15, start: 0.701789, bitrate: 15782 kb/s
   Program 1
     Stream #0.0[0x1011]: Video: h264 (High) (HDMV / 0x564D4448), yuv420p,
 1920x1080 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 50 tbc
     Stream #0.1[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo,
 s16, 192 kb/s
     Stream #0.2[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] /
 0x0090)
 [buffer @ 0x99c61e0] w:1920 h:1080 pixfmt:yuv420p tb:1/1000000 sar:1/1
 sws_param:
 [mp2 @ 0x99c65a0] bitrate 2000 is not allowed in mp2
 Output #0, mpeg, to 'test.mpg':
     Stream #0.0: Video: mpeg1video, yuv420p, 1920x1080 [SAR 1:1 DAR 16:9],
 q=2-31, 2000 kb/s, 90k tbn, 50 tbc
     Stream #0.1: Audio: mp2, 48000 Hz, stereo, s16, 2000 kb/s
 Stream mapping:
   Stream #0.0 -> #0.0 (h264 -> mpeg1video)
   Stream #0.1 -> #0.1 (ac3 -> mp2)
 Error while opening encoder for output stream #0.1 - maybe incorrect
 parameters such as bit_rate, rate, width or height

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/491#comment:2>
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