Opened 17 months ago

Last modified 16 months ago

#5710 new defect

AC3 frame sync error

Reported by: Mista_D Owned by:
Priority: normal Component: avcodec
Version: git-master Keywords: ac3 mpegts
Cc: Blocked By:
Blocking: Reproduced by developer: no
Analyzed by developer: no

Description (last modified by cehoyos)

FFmpeg can't decode specific MPEG2-TS with AC3

ffmpeg302x -i AC3.mpg -xerror -v 99 -f null -

ffmpeg version N-80123-gd74cc61 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-16)
  configuration: --prefix=/home/dennisp/010_64 --enable-static --enable-postproc --enable-gpl --enable-avfilter --enable-libx265 --enable-libx264 --enable-libfdk-aac --enable-pthreads --enable-swscale --enable-runtime-cpudetect --extra-ldflags=-static --disable-shared --disable-encoder=libgsm --disable-decoder=libgsm --disable-doc --enable-version3 --enable-nonfree --enable-libvpx --pkg-config-flags=--static
  libavutil      55. 24.100 / 55. 24.100
  libavcodec     57. 43.100 / 57. 43.100
  libavformat    57. 37.101 / 57. 37.101
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 46.100 /  6. 46.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
Splitting the commandline.
Reading option '-i' ... matched as input file with argument 'AC3.mpg'.
Reading option '-xerror' ... matched as option 'xerror' (exit on error) with argument '1'.
Reading option '-v' ... matched as option 'v' (set logging level) with argument '99'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'null'.
Reading option '-' ... matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option xerror (exit on error) with argument 1.
Applying option v (set logging level) with argument 99.
Successfully parsed a group of options.
Parsing a group of options: input file AC3.mpg.
Successfully parsed a group of options.
Opening an input file: AC3.mpg.
[file @ 0x3bd53e0] Setting default whitelist 'file,crypto'
Probing mp3 score:1 size:2048
Probing mpegts score:100 size:2048
Probing mpegvideo score:12 size:2048
[mpegts @ 0x3bd4c40] Format mpegts probed with size=2048 and score=100
score: 44, dvhs_score: -3, fec_score: -1
[mpegts @ 0x3bd4c40] Filter: pid=0x11
[mpegts @ 0x3bd4c40] Filter: pid=0x0
[mpegts @ 0x3bd4c40] PAT:
[mpegts @ 0x3bd4c40] sid=0x1 pid=0x1e0
[mpegts @ 0x3bd4c40] new_program: id=0x0001
[mpegts @ 0x3bd4c40] Filter: pid=0x1e0
[mpegts @ 0x3bd4c40] PMT: len 70
[mpegts @ 0x3bd4c40] sid=0x1 sec_num=0/0 version=31
[mpegts @ 0x3bd4c40] pcr_pid=0x1e1
[mpegts @ 0x3bd4c40] program tag: 0x0e len=3
[mpegts @ 0x3bd4c40] program tag: 0x10 len=6
[mpegts @ 0x3bd4c40] program tag: 0x0b len=2
[mpegts @ 0x3bd4c40] Filter: pid=0x1e1
[mpegts @ 0x3bd4c40] stream=0 stream_type=2 pid=1e1 prog_reg_desc=
[mpegts @ 0x3bd4c40] tag: 0x06 len=1
[mpegts @ 0x3bd4c40] Filter: pid=0x1e2
[mpegts @ 0x3bd4c40] stream=1 stream_type=81 pid=1e2 prog_reg_desc=
[mpegts @ 0x3bd4c40] tag: 0x05 len=4
[mpegts @ 0x3bd4c40] reg_desc=AC-3
[mpegts @ 0x3bd4c40] tag: 0x0a len=4
[mpegts @ 0x3bd4c40] tag: 0x81 len=10
[mpegts @ 0x3bd4c40] tuning done
[mpegts @ 0x3bd4c40] Before avformat_find_stream_info() pos: 0 bytes read:32768 seeks:0
[mpegts @ 0x3bd4c40] Skipping after seek
[mpegts @ 0x3bd4c40] PAT:
[mpegts @ 0x3bd4c40] sid=0x1 pid=0x1e0
[mpegts @ 0x3bd4c40] new_program: id=0x0001
[mpegts @ 0x3bd4c40] PMT: len 70
[mpegts @ 0x3bd4c40] sid=0x1 sec_num=0/0 version=31
[mpegts @ 0x3bd4c40] pcr_pid=0x1e1
[mpegts @ 0x3bd4c40] program tag: 0x0e len=3
[mpegts @ 0x3bd4c40] program tag: 0x10 len=6
[mpegts @ 0x3bd4c40] program tag: 0x0b len=2
[mpegts @ 0x3bd4c40] tag: 0x06 len=1
[mpegts @ 0x3bd4c40] tag: 0x05 len=4
[mpegts @ 0x3bd4c40] reg_desc=AC-3
[mpegts @ 0x3bd4c40] tag: 0x0a len=4
[mpegts @ 0x3bd4c40] tag: 0x81 len=10
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
[mpegts @ 0x3bd4c40] PAT:
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
    Last message repeated 8 times
[mpegts @ 0x3bd4c40] pid=1e2 pes_code=0x1bd
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
    Last message repeated 1 times
[mpegts @ 0x3bd4c40] PMT: len 70
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
    Last message repeated 4 times
[mpegts @ 0x3bd4c40] pid=1e2 pes_code=0x1bd
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
    Last message repeated 7 times
[mpegts @ 0x3bd4c40] PAT:
[mpegts @ 0x3bd4c40] Non-increasing DTS in stream 1: packet 4 with DTS 32860, packet 5 with DTS 32860
[mpegts @ 0x3bd4c40] pid=1e2 pes_code=0x1bd
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
    Last message repeated 6 times
[mpegts @ 0x3bd4c40] pid=1e2 pes_code=0x1bd
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
    Last message repeated 4 times
[mpegts @ 0x3bd4c40] PMT: len 70
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
    Last message repeated 2 times
[mpegts @ 0x3bd4c40] pid=1e2 pes_code=0x1bd
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
    Last message repeated 6 times
[mpegts @ 0x3bd4c40] pid=1e2 pes_code=0x1bd
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
    Last message repeated 1 times
[mpegts @ 0x3bd4c40] PAT:
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
[mpegts @ 0x3bd4c40] Probe buffer size limit of 5000000 bytes reached
[mpegts @ 0x3bd4c40] rfps: 60.000000 0.000184
    Last message repeated 1 times
[mpegts @ 0x3bd4c40] rfps: 120.000000 0.000736
    Last message repeated 1 times
[mpegts @ 0x3bd4c40] rfps: 240.000000 0.002944
    Last message repeated 1 times
[mpegts @ 0x3bd4c40] rfps: 59.940060 0.000000
    Last message repeated 1 times
[mpegts @ 0x3bd4c40] Skipping after seek
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
[mpegts @ 0x3bd4c40] pid=1e2 pes_code=0x1bd
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
    Last message repeated 1 times
[mpegts @ 0x3bd4c40] PES packet size mismatch
[mpegts @ 0x3bd4c40] 0: start_time: 0.018 duration: 0.943
[mpegts @ 0x3bd4c40] 1: start_time: 0.021 duration: 0.927
[mpegts @ 0x3bd4c40] stream: start_time: 0.195 duration: 10.477 bitrate=53994 kb/s
[mpegts @ 0x3bd4c40] After avformat_find_stream_info() pos: 0 bytes read:5853328 seeks:2 frames:67
Input #0, mpegts, from 'AC3.mpg':
  Duration: 00:00:10.48, start: 0.194844, bitrate: 53994 kb/s
  Program 1
    Stream #0:0[0x1e1], 48, 1/90000: Video: mpeg2video (Main), 1 reference frame ([2][0][0][0] / 0x0002), yuv420p(tv, left), 1280x720 (0x0) [SAR 1:1 DAR 16:9], 0/1, 59.94 fps, 59.94 tbr, 90k tbn
    Stream #0:1[0x1e2](eng), 19, 1/90000: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 384 kb/s
Successfully opened the file.
Parsing a group of options: output file -.
Applying option f (force format) with argument null.
Successfully parsed a group of options.
Opening an output file: -.
Successfully opened the file.
detected 32 logical cores
[graph 0 input from stream 0:0 @ 0x3c1bb20] Setting 'video_size' to value '1280x720'
[graph 0 input from stream 0:0 @ 0x3c1bb20] Setting 'pix_fmt' to value '0'
[graph 0 input from stream 0:0 @ 0x3c1bb20] Setting 'time_base' to value '1/90000'
[graph 0 input from stream 0:0 @ 0x3c1bb20] Setting 'pixel_aspect' to value '1/1'
[graph 0 input from stream 0:0 @ 0x3c1bb20] Setting 'sws_param' to value 'flags=2'
[graph 0 input from stream 0:0 @ 0x3c1bb20] Setting 'frame_rate' to value '60000/1001'
[graph 0 input from stream 0:0 @ 0x3c1bb20] w:1280 h:720 pixfmt:yuv420p tb:1/90000 fr:60000/1001 sar:1/1 sws_param:flags=2
[AVFilterGraph @ 0x3c18d20] query_formats: 3 queried, 2 merged, 0 already done, 0 delayed
[graph 1 input from stream 0:1 @ 0x3c1c9a0] Setting 'time_base' to value '1/48000'
[graph 1 input from stream 0:1 @ 0x3c1c9a0] Setting 'sample_rate' to value '48000'
[graph 1 input from stream 0:1 @ 0x3c1c9a0] Setting 'sample_fmt' to value 'fltp'
[graph 1 input from stream 0:1 @ 0x3c1c9a0] Setting 'channel_layout' to value '0x60f'
[graph 1 input from stream 0:1 @ 0x3c1c9a0] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x60f
[audio format for output stream 0:1 @ 0x3c1f640] Setting 'sample_fmts' to value 's16'
[audio format for output stream 0:1 @ 0x3c1f640] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_anull_0' and the filter 'audio format for output stream 0:1'
[AVFilterGraph @ 0x3c1cae0] query_formats: 4 queried, 6 merged, 3 already done, 0 delayed
[auto-inserted resampler 0 @ 0x3c21a80] [SWR @ 0x3c21e60] Using fltp internally between filters
[auto-inserted resampler 0 @ 0x3c21a80] ch:6 chl:5.1(side) fmt:fltp r:48000Hz -> ch:6 chl:5.1(side) fmt:s16 r:48000Hz
[null @ 0x3bdbf20] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
    Last message repeated 1 times
Output #0, null, to 'pipe:':
  Metadata:
    encoder         : Lavf57.37.101
    Stream #0:0, 0, 1001/60000: Video: wrapped_avframe, 1 reference frame, yuv420p(left), 1280x720 (0x0) [SAR 1:1 DAR 16:9], 0/1, q=2-31, 200 kb/s, 59.94 fps, 59.94 tbn
    Metadata:
      encoder         : Lavc57.43.100 wrapped_avframe
    Stream #0:1(eng), 0, 1/48000: Audio: pcm_s16le, 48000 Hz, 5.1(side), s16, 4608 kb/s
    Metadata:
      encoder         : Lavc57.43.100 pcm_s16le
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg2video (native) -> wrapped_avframe (native))
  Stream #0:1 -> #0:1 (ac3 (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
    Last message repeated 1 times
[mpegts @ 0x3bd4c40] Skipping after seek
[mpegts @ 0x3bd4c40] PAT:
[mpegts @ 0x3bd4c40] sid=0x1 pid=0x1e0
[mpegts @ 0x3bd4c40] new_program: id=0x0001
[mpegts @ 0x3bd4c40] PMT: len 70
[mpegts @ 0x3bd4c40] sid=0x1 sec_num=0/0 version=31
[mpegts @ 0x3bd4c40] pcr_pid=0x1e1
[mpegts @ 0x3bd4c40] program tag: 0x0e len=3
[mpegts @ 0x3bd4c40] program tag: 0x10 len=6
[mpegts @ 0x3bd4c40] program tag: 0x0b len=2
[mpegts @ 0x3bd4c40] tag: 0x06 len=1
[mpegts @ 0x3bd4c40] tag: 0x05 len=4
[mpegts @ 0x3bd4c40] reg_desc=AC-3
[mpegts @ 0x3bd4c40] tag: 0x0a len=4
[mpegts @ 0x3bd4c40] tag: 0x81 len=10
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
[mpegts @ 0x3bd4c40] PAT:
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
    Last message repeated 1 times
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
    Last message repeated 1 times
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
[mpeg2video @ 0x3bdb340] allocating dummy last picture for B frame
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[mpegts @ 0x3bd4c40] pid=1e2 pes_code=0x1bd
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[mpegts @ 0x3bd4c40] PMT: len 70
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[mpegts @ 0x3bd4c40] pid=1e1 pes_code=0x1e0
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[ac3 @ 0x3bdb9a0] frame sync error
[AVIOContext @ 0x3bdd780] Statistics: 7852176 bytes read, 2 seeks
Conversion failed!

Attachments (1)

AC3_cut.mpg (2.4 MB) - added by cehoyos 16 months ago.

Change History (6)

comment:2 Changed 16 months ago by cehoyos

  • Component changed from ffmpeg to avcodec
  • Keywords ac3 mpegts added
  • Version changed from 3.0.2 to unspecified

How was the sample created?
The first audio frame looks incomplete (the first 288 bytes are missing iiuc).

Changed 16 months ago by cehoyos

comment:3 Changed 16 months ago by Mista_D

if use seek to skip broken frame, it still fails.

ffmpeg -i AC3.mpg -ss 1 -xerror -f null -
....
[ac3 @ 0000000002c57900] frame sync error
Conversion failed!

File is a capture of a live MPEG2-TS feed

comment:4 Changed 16 months ago by cehoyos

  • Description modified (diff)
  • Version changed from unspecified to git-master

Please remember to always test current FFmpeg git head before reporting an issue here.

comment:5 Changed 16 months ago by Mista_D

Tried with July 18th, 2016's ffmpeg version N-81045-g450cf40
same error

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