Opened 11 years ago
Last modified 11 years ago
#3661 open defect
Blu-Ray stream changes audio from ac-3 to dts
| Reported by: | OrbWeaver | Owned by: | |
|---|---|---|---|
| Priority: | normal | Component: | undetermined |
| Version: | git-master | Keywords: | mpegts ac3 |
| Cc: | nfxjfg@googlemail.com | Blocked By: | |
| Blocking: | Reproduced by developer: | yes | |
| Analyzed by developer: | no |
Description
Summary of the bug:
Attempting to view the Blu-Ray "Defiance" (UK release) using mplayer built against ffmpeg git commit f932e5f7169282daaa06b08500d2c632cf70e14e results in missing audio after the first few seconds, with multiple errors on the console. Extracting the audio stream to a separate file and playing with ffplay gives the same result:
ffplay version N-40092-gf932e5f Copyright (c) 2003-2014 the FFmpeg developers
built on May 22 2014 10:10:57 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
configuration: --enable-ffplay
libavutil 52. 86.100 / 52. 86.100
libavcodec 55. 63.100 / 55. 63.100
libavformat 55. 40.100 / 55. 40.100
libavdevice 55. 13.101 / 55. 13.101
libavfilter 4. 5.100 / 4. 5.100
libswscale 2. 6.100 / 2. 6.100
libswresample 0. 19.100 / 0. 19.100
[ac3 @ 0x7fd23c0008c0] Estimating duration from bitrate, this may be inaccurate
Input #0, ac3, from '/tmp/defiance_ac3.dump':
Duration: 00:03:07.25, start: 0.000000, bitrate: 448 kb/s
Stream #0:0: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
[ac3 @ 0x7fd23c005be0] frame sync errorvq= 0KB sq= 0B f=0/0
[ac3 @ 0x7fd23c005be0] new coupling strategy must be present in block 0
[ac3 @ 0x7fd23c005be0] error decoding the audio block
[ac3 @ 0x7fd23c005be0] frame sync errorvq= 0KB sq= 0B f=0/0
[ac3 @ 0x7fd23c005be0] Additional substreams is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
[ac3 @ 0x7fd23c005be0] If you want to help, upload a sample of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ and contact the ffmpeg-devel mailing list.
[ac3 @ 0x7fd23c005be0] unsupported frame type : skipping frame
Complete ffplay command output is here: http://pastebin.com/y24PTdFD
The video looks OK and the other audio streams on the Blu-Ray play without problems, so this doesn't seem to be a problem with failed AACS decryption. I will attach the start of the AC-3 audio stream in question to illustrate the problem.
Attachments (2)
Change History (10)
by , 11 years ago
| Attachment: | defiance_ac3.dump added |
|---|
comment:1 by , 11 years ago
That stream is not entirely AC-3, after a few seconds it switches to DTS.
This is a perfectly valid thing for a Blu-ray to do, switching codecs on segment changes, and if I remember correctly, Defiance had a small logo with AC-3 audio before the main move with DTS audio.
Its up to the player to handle these transitions.
comment:2 by , 11 years ago
| Resolution: | → invalid |
|---|---|
| Status: | new → closed |
Confirmed that forcing the audio to DTS (although only the libdca DTS works, not ffmpeg DTS) plays the audio fine. So this does indeed seem to be a problem with mplayer's codec switching/identification, not with ffmpeg.
comment:3 by , 11 years ago
| Cc: | added |
|---|
So this does indeed seem to be a problem with mplayer's codec switching/identification, not with ffmpeg.
MPlayer has no codec switching. Did you make sure ffmpeg actually uses libavformat here? It might still detect the DTS stream.
comment:4 by , 11 years ago
| Component: | avcodec → undetermined |
|---|---|
| Keywords: | mpegts added |
| Resolution: | invalid |
| Status: | closed → reopened |
Please provide the beginning of the original transport stream.
comment:5 by , 11 years ago
If the 2.5 MB attachment limit enforced by this site is too low I can upload a larger sample of the transport stream somewhere else.
comment:6 by , 11 years ago
Please upload a sample that is long enough to reproduce your original problem.
Either use http://www.datafilehost.com/ (100MB limit) or read https://ffmpeg.org/bugreports.html (there is NO filesize limit).
comment:7 by , 11 years ago
Uploaded longer version to FTP/incoming as defiance_ac3_to_dts_switch.dump
comment:8 by , 11 years ago
| Reproduced by developer: | set |
|---|---|
| Status: | reopened → open |
| Summary: | Unable to play AC-3 stream in Blu-Ray → Blu-Ray stream changes audio from ac-3 to dts |
$ ffmpeg -i defiance_ac3_to_dts_switch.dump
ffmpeg version N-63366-gf932e5f Copyright (c) 2000-2014 the FFmpeg developers
built on May 22 2014 13:27:45 with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl
libavutil 52. 86.100 / 52. 86.100
libavcodec 55. 63.100 / 55. 63.100
libavformat 55. 40.100 / 55. 40.100
libavdevice 55. 13.101 / 55. 13.101
libavfilter 4. 5.100 / 4. 5.100
libswscale 2. 6.100 / 2. 6.100
libswresample 0. 19.100 / 0. 19.100
libpostproc 52. 3.100 / 52. 3.100
[mpegts @ 0x1da8ae0] Failed to open codec in av_find_stream_info
[mpegts @ 0x1da8ae0] PES packet size mismatch
Last message repeated 3 times
Input #0, mpegts, from 'defiance_ac3_to_dts_switch.dump':
Duration: 00:00:07.88, start: 600.000000, bitrate: 42566 kb/s
Program 1
Stream #0:0[0x1011]: Video: vc1 (Advanced) (VC-1 / 0x312D4356), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 23.98 tbr, 90k tbn, 47.95 tbc
Stream #0:1[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 448 kb/s
Stream #0:2[0x1101]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 448 kb/s
Stream #0:3[0x1102]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 448 kb/s
Stream #0:4[0x1103]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:5[0x1104]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:6[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090), 1920x1080
Stream #0:7[0x1201]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090), 1920x1080
Stream #0:8[0x1202]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090), 1920x1080
Stream #0:9[0x1203]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090), 1920x1080
Stream #0:10[0x1204]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090), 1920x1080
At least one output file must be specified
$ ffmpeg -skip_initial_bytes 29630000 -i defiance_ac3_to_dts_switch.dump
ffmpeg version N-63366-gf932e5f Copyright (c) 2000-2014 the FFmpeg developers
built on May 22 2014 13:27:45 with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl
libavutil 52. 86.100 / 52. 86.100
libavcodec 55. 63.100 / 55. 63.100
libavformat 55. 40.100 / 55. 40.100
libavdevice 55. 13.101 / 55. 13.101
libavfilter 4. 5.100 / 4. 5.100
libswscale 2. 6.100 / 2. 6.100
libswresample 0. 19.100 / 0. 19.100
libpostproc 52. 3.100 / 52. 3.100
[mpegts @ 0x2d8c8c0] Failed to open codec in av_find_stream_info
[pgssub @ 0x2db0c80] Bitmap dimensions larger than video.
[mpegts @ 0x2d8c8c0] PES packet size mismatch
Last message repeated 3 times
Input #0, mpegts, from 'defiance_ac3_to_dts_switch.dump':
Duration: 00:00:07.95, start: 599.935200, bitrate: 42219 kb/s
Program 1
Stream #0:0[0x1011]: Video: vc1 (VC-1 / 0x312D4356), 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc
Stream #0:1[0x1100]: Audio: dts (DTS-HD MA) ([134][0][0][0] / 0x0086), 48000 Hz, 5.1(side), fltp, 1536 kb/s
Stream #0:2[0x1101]: Audio: dts (DTS-HD MA) ([134][0][0][0] / 0x0086), 48000 Hz, 5.1(side), fltp, 1536 kb/s
Stream #0:3[0x1102]: Audio: dts (DTS-HD MA) ([134][0][0][0] / 0x0086), 48000 Hz, 5.1(side), fltp, 1536 kb/s
Stream #0:4[0x1103]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 256 kb/s
Stream #0:5[0x1104]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 256 kb/s
Stream #0:6[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090), 1920x1080
Stream #0:7[0x1201]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090), 1920x1080
Stream #0:8[0x1202]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090), 1920x1080
Stream #0:9[0x1203]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090), 1920x1080
Stream #0:10[0x1204]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090), 1920x1080
At least one output file must be specified
Problematic AC3 audio stream