ffmpeg cache protocol bug?

[testn]

Summary of the bug:

It looks like the duration is incorrect if cache protocol is used. (cache 00:00:03.71 vs file 00:02:25.68 )

How to reproduce:

$ ffprobe "file:///Users/xxxx/Downloads/Videos/Hellboy.ts" 
[mpeg2video @ 0x7fc6e9015600] 0x0 is invalid
    Last message repeated 29 times
[mpegts @ 0x7fc6e900d000] PES packet size mismatch
Input #0, mpegts, from 'file:///Users/xxxx/Downloads/Videos/Hellboy.ts':
  Duration: 00:02:25.68, start: 41174.341300, bitrate: 10882 kb/s
  Program 1 
    Stream #0:0[0x10]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 29.42 fps, 59.94 tbr, 90k tbn, 59.94 tbc
    Stream #0:1[0x11](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 384 kb/s

$ cat ~/Downloads/Videos/Hellboy.ts |  ffprobe "cache:pipe:0"  
[mpeg2video @ 0x7fd4f9815600] 0x0 is invalid
    Last message repeated 29 times
Input #0, mpegts, from 'cache:pipe:0':
  Duration: 00:00:03.71, start: 41174.341300, bitrate: 11763 kb/s
  Program 1 
    Stream #0:0[0x10]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 29.42 fps, 59.94 tbr, 90k tbn, 59.94 tbc
    Stream #0:1[0x11](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 384 kb/s

Patches should be submitted to the ffmpeg-devel mailing list and not this bug tracker.

[cehoyos]

Is this only reproducible with ffprobe of also with ffmpeg -i ?

[testn]

Yes, it's reproducible on both ffprobe and ffmpeg

[cehoyos]

Then please provide the failing ffmpeg command line together with the complete, uncut console output (only report problems against ffprobe if they are not reproducible with ffmpeg).

[testn]

The input file can be retrieved from ​http://samples.mplayerhq.hu/HDTV/Hellboy.ts
Here is the output from ffprobe

$ cat  Videos/Hellboy.ts| ffprobe -i "cache:pipe:0"   
ffprobe version 1.2 Copyright (c) 2007-2013 the FFmpeg developers
  built on Mar 19 2013 10:25:50 with Apple clang version 4.1 (tags/Apple/clang-421.11.66) (based on LLVM 3.1svn)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/1.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --cc=cc --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid --enable-libfdk-aac
  libavutil      52. 18.100 / 52. 18.100
  libavcodec     54. 92.100 / 54. 92.100
  libavformat    54. 63.104 / 54. 63.104
  libavdevice    54.  3.103 / 54.  3.103
  libavfilter     3. 42.103 /  3. 42.103
  libswscale      2.  2.100 /  2.  2.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
[mpeg2video @ 0x7fe7f4015600] 0x0 is invalid
    Last message repeated 29 times
Input #0, mpegts, from 'cache:pipe:0':
  Duration: 00:00:03.71, start: 41174.341300, bitrate: 11763 kb/s
  Program 1 
    Stream #0:0[0x10]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 29.42 fps, 59.94 tbr, 90k tbn, 59.94 tbc
    Stream #0:1[0x11](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 384 kb/s

and from ffmpeg

$ cat  Videos/Hellboy.ts| ffmpeg -i "cache:pipe:0"   /tmp/test4.mp4
ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers
  built on Mar 19 2013 10:25:50 with Apple clang version 4.1 (tags/Apple/clang-421.11.66) (based on LLVM 3.1svn)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/1.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --cc=cc --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid --enable-libfdk-aac
  libavutil      52. 18.100 / 52. 18.100
  libavcodec     54. 92.100 / 54. 92.100
  libavformat    54. 63.104 / 54. 63.104
  libavdevice    54.  3.103 / 54.  3.103
  libavfilter     3. 42.103 /  3. 42.103
  libswscale      2.  2.100 /  2.  2.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
[mpeg2video @ 0x7fec9c021400] 0x0 is invalid
    Last message repeated 29 times
Input #0, mpegts, from 'cache:pipe:0':
  Duration: 00:00:03.71, start: 41174.341300, bitrate: 11763 kb/s
  Program 1 
    Stream #0:0[0x10]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 29.42 fps, 59.94 tbr, 90k tbn, 59.94 tbc
    Stream #0:1[0x11](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 384 kb/s
[libx264 @ 0x7fec9c019a00] using SAR=1/1
[libx264 @ 0x7fec9c019a00] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
[libx264 @ 0x7fec9c019a00] profile High, level 4.0
[libx264 @ 0x7fec9c019a00] 264 - core 125 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to '/tmp/test4.mp4':
  Metadata:
    encoder         : Lavf54.63.104
    Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 30k tbn, 29.97 tbc
    Stream #0:1(eng): Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, stereo, s16, 128 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg2video -> libx264)
  Stream #0:1 -> #0:1 (ac3 -> libfaac)
Press [q] to stop, [?] for help
[ac3 @ 0x7fec9c019400] frame sync error
Error while decoding stream #0:1: Operation not permitted
Input stream #0:1 frame changed from rate:48000 fmt:fltp ch:2 chl:stereo to rate:48000 fmt:fltp ch:6 chl:5.1(side)
[libfaac @ 0x7fec9c01a800] Queue input is backward in time
[mp4 @ 0x7fec9c03c600] st:0 PTS: 2048 DTS: 2048 < 2561 invalid, clipping
frame=   24 fps=0.0 q=-1.0 Lsize=      78kB time=00:00:00.73 bitrate= 868.5kbits/s dup=23 drop=0    
video:74kB audio:2kB subtitle:0 global headers:0kB muxing overhead 2.188826%
[libx264 @ 0x7fec9c019a00] frame I:1     Avg QP:27.48  size: 68520
[libx264 @ 0x7fec9c019a00] frame P:6     Avg QP:30.70  size:   570
[libx264 @ 0x7fec9c019a00] frame B:17    Avg QP:29.35  size:   168
[libx264 @ 0x7fec9c019a00] consecutive B-frames:  4.2%  0.0% 12.5% 83.3%
[libx264 @ 0x7fec9c019a00] mb I  I16..4: 63.5%  2.1% 34.3%
[libx264 @ 0x7fec9c019a00] mb P  I16..4:  1.2%  0.0%  0.0%  P16..4:  1.1%  0.1%  0.3%  0.0%  0.0%    skip:97.2%
[libx264 @ 0x7fec9c019a00] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  2.0%  0.0%  0.0%  direct: 0.0%  skip:98.0%  L0:39.0% L1:61.0% BI: 0.0%
[libx264 @ 0x7fec9c019a00] 8x8 transform intra:2.0% inter:96.6%
[libx264 @ 0x7fec9c019a00] coded y,uvDC,uvAC intra: 39.6% 53.6% 26.6% inter: 0.1% 0.1% 0.0%
[libx264 @ 0x7fec9c019a00] i16 v,h,dc,p:  4% 95%  0%  0%
[libx264 @ 0x7fec9c019a00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  1% 71% 20%  0%  0%  0%  0%  0%  7%
[libx264 @ 0x7fec9c019a00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu:  0% 99%  1%  0%  0%  0%  0%  0%  0%
[libx264 @ 0x7fec9c019a00] i8c dc,h,v,p: 37% 52% 10%  1%
[libx264 @ 0x7fec9c019a00] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x7fec9c019a00] ref P L0: 81.7%  2.9% 11.9%  3.4%
[libx264 @ 0x7fec9c019a00] ref B L0: 45.6% 53.9%  0.5%
[libx264 @ 0x7fec9c019a00] ref B L1: 88.4% 11.6%
[libx264 @ 0x7fec9c019a00] kb/s:747.23

[michael]

Fixed in 8706910c4c051dbc7377a702aff11424585d4778
Needs -read_ahead_limit -1