[FFmpeg-trac] #3714(avformat:open): Remuxing mpegts results in 5% bigger file size than original file (was: Muxing results in bigger file size than original file)

FFmpeg trac at avcodec.org
Wed Jun 11 23:02:30 CEST 2014


#3714: Remuxing mpegts results in 5% bigger file size than original file
------------------------------------+------------------------------------
             Reporter:  DavJames    |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:  mpegts      |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  0           |
------------------------------------+------------------------------------
Changes (by cehoyos):

 * status:  new => open
 * reproduced:  0 => 1
 * component:  undetermined => avformat
 * version:  unspecified => git-master
 * keywords:   => mpegts


Comment:

 {{{
 $ ffmpeg -i FFmpeg\ Sample_cut.ts -acodec copy -vcodec copy out.ts
 ffmpeg version N-63896-g27b8ef5 Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Jun 11 2014 18:34:12 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      52. 89.100 / 52. 89.100
   libavcodec     55. 66.100 / 55. 66.100
   libavformat    55. 43.100 / 55. 43.100
   libavdevice    55. 13.101 / 55. 13.101
   libavfilter     4.  7.100 /  4.  7.100
   libswscale      2.  6.100 /  2.  6.100
   libswresample   0. 19.100 /  0. 19.100
   libpostproc    52.  3.100 / 52.  3.100
 [mpegts @ 0x1cc5c20] PES packet size mismatch
 Input #0, mpegts, from 'FFmpeg Sample_cut.ts':
   Duration: 00:00:00.96, start: 0.200000, bitrate: 21333 kb/s
   Program 1
     Stream #0:0[0x201]: Video: h264 (High) ([27][0][0][0] / 0x001B),
 yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn,
 50 tbc
     Stream #0:1[0x202]: Audio: aac ([15][0][0][0] / 0x000F), 48000 Hz,
 stereo, fltp, 229 kb/s
 Output #0, mpegts, to 'out.ts':
   Metadata:
     encoder         : Lavf55.43.100
     Stream #0:0: Video: h264 ([27][0][0][0] / 0x001B), yuv420p, 1920x1080
 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 90k tbn, 25 tbc
     Stream #0:1: Audio: aac ([15][0][0][0] / 0x000F), 48000 Hz, stereo,
 229 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
   Stream #0:1 -> #0:1 (copy)
 Press [q] to stop, [?] for help
 [mpegts @ 0x1cc5c20] PES packet size mismatch
 frame=   45 fps=0.0 q=-1.0 Lsize=    2637kB time=00:00:00.72
 bitrate=29998.1kbits/s
 video:2431kB audio:9kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 8.043469%
 }}}
 The output file is 5% larger than the input file.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3714#comment:3>
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