#3842: AAC (mp4a) DASH takes abnormally long to detect (~4 - 6s)
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Reporter: viperfx | Owner:
Type: defect | Status: new
Priority: normal | Component: avformat
Version: 2.2.4 | Resolution:
Keywords: mov | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by cehoyos):
FFmpeg claims it did not read the whole file (less than one quarter), how
can I reproduce that this is not correct?
{{{
$ ffmpeg -loglevel debug -i videoplayback.mp4
ffmpeg version N-65479-g7117547 Copyright (c) 2000-2014 the FFmpeg
developers
built on Aug 10 2014 13:36:46 with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl
libavutil 54. 0.100 / 54. 0.100
libavcodec 56. 0.100 / 56. 0.100
libavformat 56. 0.100 / 56. 0.100
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 0.100 / 5. 0.100
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 0.100 / 1. 0.100
libpostproc 53. 0.100 / 53. 0.100
Splitting the commandline.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging
level) with argument 'debug'.
Reading option '-i' ... matched as input file with argument
'videoplayback.mp4'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option loglevel (set logging level) with argument debug.
Successfully parsed a group of options.
Parsing a group of options: input file videoplayback.mp4.
Successfully parsed a group of options.
Opening an input file: videoplayback.mp4.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x33f4b20] Format mov,mp4,m4a,3gp,3g2,mj2
probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x33f4b20] ISO: File Type Major Brand: dash
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x33f4b20] Before avformat_find_stream_info()
pos: 3374213 bytes read:720896 seeks:21
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x33f4b20] All info found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x33f4b20] After avformat_find_stream_info()
pos: 4796 bytes read:753664 seeks:22 frames:1
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'videoplayback.mp4':
Metadata:
major_brand : dash
minor_version : 0
compatible_brands: iso6mp41
creation_time : 2014-04-25 14:50:56
Duration: 00:03:35.03, start: 0.000000, bitrate: 128 kb/s
Stream #0:0(und), 1, 1/44100: Audio: aac (mp4a / 0x6134706D), 44100
Hz, stereo, fltp, 125 kb/s (default)
Metadata:
creation_time : 2014-04-25 14:50:56
handler_name : SoundHandler
Successfully opened the file.
At least one output file must be specified
[AVIOContext @ 0x33f3be0] Statistics: 753664 bytes read, 22 seeks
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/3842#comment:6>
FFmpeg <https://ffmpeg.org>
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