[FFmpeg-trac] #542(FFmpeg:new): Missing audio when encoding to mpeg-ts with "-threads 0"

[FFmpeg]

#542: Missing audio when encoding to mpeg-ts with "-threads 0"
--------------------------------------+---------------------------------
               Reporter:  terran      |                  Owner:  michael
                   Type:  defect      |                 Status:  new
               Priority:  important   |              Component:  FFmpeg
                Version:  git-master  |               Keywords:
             Blocked By:              |               Blocking:
Reproduced by developer:  0           |  Analyzed by developer:  0
--------------------------------------+---------------------------------
 When encoding from h264/aac mp4 to mpeg-ts, the audio stream is lost or
 corrupt. Mediainfo reports an audio stream but it appears to be empty.
 This *only* occurs when '-threads' set to 0. Using a specific thread size
 (e.g. -threads 4) prevents the issue.

 I can consistently reproduce this with centos 5, but not with osx.

 Note that both audio and video playback with -threads >0 as well as builds
 from August and earlier.

 command used:

 ffmpeg -i rehearsal.mp4 -threads 0 -s 1920x1080 -f mpegts -b:v 7000000
 -qscale:v 1 -r 30.0 -g 30.0 -map_chapters -1 -vcodec libx264 -coder 0 -cmp
 +chroma -partitions +parti8x8+parti4x4+partp8x8+partb8x8 -me_method hex
 -subq 5 -me_range 16 -keyint_min 25 -sc_threshold 0 -i_qfactor 0.71
 -b_strategy 1 -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -directpred 1 -wpredp
 0 -fast-pskip 1 -vprofile baseline -acodec libfaac -b:a 48000 -ac 2 -ar
 44100 -t 5 -y rehearsal.ts

 output from ffmpeg -v 9 -loglevel 99 -i:

 ffmpeg version N-33513-g3473639, Copyright (c) 2000-2011 the FFmpeg
 developers
   built on Oct 11 2011 10:15:29 with gcc 4.1.2 20080704 (Red Hat 4.1.2-48)
   configuration: --enable-pthreads --enable-avfilter --enable-shared
 --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables
 --enable-libx264 --enable-libfaac
   libavutil    51. 20. 1 / 51. 20. 1
   libavcodec   53. 20. 1 / 53. 20. 1
   libavformat  53. 15. 0 / 53. 15. 0
   libavdevice  53.  4. 0 / 53.  4. 0
   libavfilter   2. 43. 6 /  2. 43. 6
   libswscale    2.  1. 0 /  2.  1. 0
   libpostproc  51.  2. 0 / 51.  2. 0
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x17a32780] Format mov,mp4,m4a,3gp,3g2,mj2
 probed with size=2048 and score=100
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x17a32780] ISO: File Type Major Brand: mp42
 [aac @ 0x17a3a7e0] Unsupported bit depth: 0
 [h264 @ 0x17a39a40] no picture
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x17a32780] All info found

 Seems stream 0 codec frame rate differs from container frame rate: 59.94
 (60000/1001) -> 29.97 (2997/100)
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'rehearsal.mp4':
   Metadata:
     major_brand     : mp42
     minor_version   : 0
     compatible_brands: mp42mp41
     creation_time   : 2011-08-17 04:36:21
   Duration: 00:12:29.95, start: 0.000000, bitrate: 30155 kb/s
     Stream #0:0(eng), 10, 1/29970: Video: h264 (Main) (avc1 / 0x31637661),
 yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 1001/60000, 29995 kb/s, 29.97 fps,
 29.97 tbr, 29970 tbn, 59.94 tbc
     Metadata:
       creation_time   : 2011-08-17 04:36:21
     Stream #0:1(eng), 1, 1/48000: Audio: aac (mp4a / 0x6134706D), 48000
 Hz, stereo, s16, 157 kb/s
     Metadata:
       creation_time   : 2011-08-17 04:36:21

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/542>
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