#4069 closed defect (fixed)
G.726 in mov cannot be decoded
Reported by: | cgbug | Owned by: | |
---|---|---|---|
Priority: | normal | Component: | avformat |
Version: | git-master | Keywords: | g726 mov |
Cc: | Blocked By: | ||
Blocking: | Reproduced by developer: | yes | |
Analyzed by developer: | no |
Description
Sample:
http://www.datafilehost.com/d/8bc5479e
ffmpeg version N-67289-g7f24e1e Copyright (c) 2000-2014 the FFmpeg developers
built on Oct 30 2014 00:04:25 with gcc 4.9.1 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 54. 11.100 / 54. 11.100
libavcodec 56. 10.100 / 56. 10.100
libavformat 56. 11.100 / 56. 11.100
libavdevice 56. 2.100 / 56. 2.100
libavfilter 5. 2.100 / 5. 2.100
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
[g726 @ 02a0f7c0] Invalid number of bits 16
[mov,mp4,m4a,3gp,3g2,mj2 @ 02a07a00] Failed to open codec in av_find_stream_info
[g726 @ 02a0f7c0] Invalid number of bits 16
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'g726.mp4':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
creation_time : 1970-01-01 00:00:00
encoder : Lavf52.31.0
encoder-eng : Lavf52.31.0
Duration: 00:04:58.64, start: 0.000000, bitrate: 1750 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc), 800x600 [SAR 1:1 DAR 4:3], 1716 kb/s, 15 fps, 15 tbr, 100 tbn, 29.97 tbc (default)
Metadata:
creation_time : 1970-01-01 00:00:00
handler_name : DataHandler
Stream #0:1(eng): Audio: adpcm_g726 (ms[0]E / 0x4500736D), 8000 Hz, mono, 32 kb/s (default)
Metadata:
creation_time : 1970-01-01 00:00:00
handler_name : DataHandler
At least one output file must be specified
Change History (7)
comment:1 by , 10 years ago
comment:2 by , 10 years ago
Component: | avcodec → avformat |
---|---|
Keywords: | mov added |
Reproduced by developer: | set |
Resolution: | → fixed |
Status: | new → closed |
Summary: | G.726 decode failure → G.726 in mov cannot be decoded |
I believe the file you uploaded does not conform to any specification and cannot be decoded without either a change to the file or the source code (that makes decoding other G.726 files impossible).
Commit e6b7246a allows to write files that can be decoded by FFmpeg. They probably don't conform to any specification either. If you have a G.726 mp4 file that can be decoded by any other player, please upload it.
If the file you uploaded can be decoded with any software, please tell us!
comment:3 by , 10 years ago
did not decode using binary codec from here:
http://samples.mplayerhq.hu/A-codecs/g726/
also remuxing the audio didnt work (mencoder -oac copy > avi , ffmpeg avi > wav).
file looks like it was made by chinese security camera using lavf.
we would have to have the software that came with the camera to figure out how to play this back.
comment:4 by , 10 years ago
How do you know that this file was muxed by a security camera and why do you think playback is possible with the camera software?
It's not exactly difficult to play back the uploaded sample but imo it only makes sense if anything can play it.
comment:5 by , 10 years ago
because the video is in a warehouse or store full of security cameras?
and because the video has a timestamp, a classic sign of a video camera feed.
i think playback is possible because even the worst security cameras at least have a crummy player application.
comment:6 by , 10 years ago
I did not create this file myself. All I know is that it was created by muxing raw streams taken from a camera with GStreamer. The fix you committed will probably prevent similar broken files from being created in the future.
Where did you find this file?
Which software plays it?