Opened 6 years ago
Last modified 4 years ago
#7656 new defect
recording of .mpd list failed after 10 second recording
| Reported by: | Anan5a | Owned by: | |
|---|---|---|---|
| Priority: | minor | Component: | avformat |
| Version: | git-master | Keywords: | dash mov |
| Cc: | blue-t@web.de | Blocked By: | |
| Blocking: | Reproduced by developer: | yes | |
| Analyzed by developer: | no |
Description
Summary of the bug:
When trying to record an encrypted video stream (manifest.mpd) file the ffmpeg command record first 10sec and fails with error 'saiz atom found without saio'. The recorded 10 sec has the right audio and video streams
How to reproduce:
% ffmpeg -f dash -i https://cdn.cloud.altbalaji.com/content/2016-11/771-582320d3d2ac9/manifest.mpd -c copy output.mp4 ffmpeg version git master built on Debian testing
Error output :
root@app-server:~# ffmpeg -f dash -i https://cdn.cloud.altbalaji.com/content/2016-11/771-582320d3d2ac9/manifest.mpd -c copy out.mp4
ffmpeg version 4.1-1 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 8 (Debian 8.2.0-12)
configuration: --prefix=/usr --extra-version=1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
libavutil 56. 22.100 / 56. 22.100
libavcodec 58. 35.100 / 58. 35.100
libavformat 58. 20.100 / 58. 20.100
libavdevice 58. 5.100 / 58. 5.100
libavfilter 7. 40.101 / 7. 40.101
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 3.100 / 5. 3.100
libswresample 3. 3.100 / 3. 3.100
libpostproc 55. 3.100 / 55. 3.100
Input #0, dash, from 'https://cdn.cloud.altbalaji.com/content/2016-11/771-582320d3d2ac9/manifest.mpd':
Duration: 01:51:12.00, start: 0.000000, bitrate: 0 kb/s
Program 0
Stream #0:0: Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 320x180, 0 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
Metadata:
variant_bitrate : 152616
id : 0
Stream #0:1: Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 480x270, 0 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
Metadata:
variant_bitrate : 397732
id : 2
Stream #0:2: Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 640x360, 0 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
Metadata:
variant_bitrate : 595344
id : 4
Stream #0:3: Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 640x360, 0 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
Metadata:
variant_bitrate : 840229
id : 6
Stream #0:4: Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1024x576, 0 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
Metadata:
variant_bitrate : 1188553
id : 8
Stream #0:5: Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1024x576, 0 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
Metadata:
variant_bitrate : 1778233
id : 10
Stream #0:6: Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720, 1 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
Metadata:
variant_bitrate : 2368356
id : 12
Stream #0:7: Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720, 1 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
Metadata:
variant_bitrate : 3250611
id : 14
Stream #0:8: Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1920x1080, 2 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
Metadata:
variant_bitrate : 4436802
id : 16
Stream #0:9: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 0 kb/s
Metadata:
variant_bitrate : 69629
id : 1
Stream #0:10: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 0 kb/s
Metadata:
variant_bitrate : 69629
id : 3
Stream #0:11: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 0 kb/s
Metadata:
variant_bitrate : 69629
id : 5
Stream #0:12: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 0 kb/s
Metadata:
variant_bitrate : 69629
id : 7
Stream #0:13: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 0 kb/s
Metadata:
variant_bitrate : 69629
id : 9
Stream #0:14: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 0 kb/s
Metadata:
variant_bitrate : 69629
id : 11
Stream #0:15: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 0 kb/s
Metadata:
variant_bitrate : 101629
id : 13
Stream #0:16: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 0 kb/s
Metadata:
variant_bitrate : 101629
id : 15
Stream #0:17: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 0 kb/s
Metadata:
variant_bitrate : 101629
id : 17
File 'out.mp4' already exists. Overwrite ? [y/N] y
Output #0, mp4, to 'out.mp4':
Metadata:
encoder : Lavf58.20.100
Stream #0:0: Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1920x1080, q=2-31, 2 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc
Metadata:
variant_bitrate : 4436802
id : 16
Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 0 kb/s
Metadata:
variant_bitrate : 69629
id : 1
Stream mapping:
Stream #0:8 -> #0:0 (copy)
Stream #0:9 -> #0:1 (copy)
Press [q] to stop, [?] for help
[dash @ 0x563b93e7f540] No longer receiving stream_index 0
[dash @ 0x563b93e7f540] No longer receiving stream_index 1
[dash @ 0x563b93e7f540] No longer receiving stream_index 2
[dash @ 0x563b93e7f540] No longer receiving stream_index 3
[dash @ 0x563b93e7f540] No longer receiving stream_index 4
[dash @ 0x563b93e7f540] No longer receiving stream_index 5
[dash @ 0x563b93e7f540] No longer receiving stream_index 6
[dash @ 0x563b93e7f540] No longer receiving stream_index 7
[dash @ 0x563b93e7f540] No longer receiving stream_index 10
[dash @ 0x563b93e7f540] No longer receiving stream_index 11
[dash @ 0x563b93e7f540] No longer receiving stream_index 12
[dash @ 0x563b93e7f540] No longer receiving stream_index 13
[dash @ 0x563b93e7f540] No longer receiving stream_index 14
[dash @ 0x563b93e7f540] No longer receiving stream_index 15
[dash @ 0x563b93e7f540] No longer receiving stream_index 16
[dash @ 0x563b93e7f540] No longer receiving stream_index 17
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x563b95bc2000] Failed to seek for auxiliary info, will only parse senc atoms for encryption info
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x563b95bc2000] saiz atom found without saio
frame= 244 fps=0.0 q=-1.0 Lsize= 2492kB time=00:00:09.98 bitrate=2044.8kbits/s speed= 147x
video:2402kB audio:79kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.435219%
root@app-server:~#
Change History (6)
comment:1 by , 6 years ago
| Component: | ffmpeg → avformat |
|---|---|
| Keywords: | dash added |
comment:2 by , 6 years ago
Not a bug either. This stream is protected with Widevine DRM. You would need to provide Content Key for decryption, which is delivered only as part of a DRM license.
It is common with some Widevine encryption tools to intentionally leave first 10 seconds unencrypted, that's also why you can get that part and not the encrypted rest.
comment:4 by , 6 years ago
Yes, two methods available:
- each DRM system has its own UUID, this mpd manifest declared in its schemeIdUri attribute that its UUID is edef8ba9-79d6-4ace-a3c8-27dcd51d21ed, which belongs to Widevine, please see for example https://dashif.org/identifiers/content_protection/ for more info.
- utilized DRM system can also be identified by the same UUID in PSSH box of an initialization mp4 segment (I am not too acquainted with webm container, but it appears to also include hints about encryption https://dvcs.w3.org/hg/html-media/raw-file/tip/encrypted-media/encrypted-media-fpwd.html#webm).
There can be more DRM systems utilized for each stream as long as all adhere to CENC standards. Therefore the manifest can list more than one ContentProtection element for each track and have more than one PSSH box in mp4 initialization segments.
comment:5 by , 6 years ago
| Keywords: | mov added |
|---|---|
| Priority: | normal → minor |
Encryption detection seems useful to me.
comment:6 by , 4 years ago
| Cc: | added |
|---|
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Not a regression.
Does the stream work with other players?