[FFmpeg-trac] #3942(undetermined:open): misbehaviour of ``afade`` chained with ``amovie``
FFmpeg
trac at avcodec.org
Fri Sep 12 01:28:27 CEST 2014
#3942: misbehaviour of ``afade`` chained with ``amovie``
-------------------------------------+-------------------------------------
Reporter: while0pass | Owner:
Type: defect | Status: open
Priority: normal | Component:
Version: git-master | undetermined
Keywords: amovie | Resolution:
afade | Blocked By:
Blocking: | Reproduced by developer: 1
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Changes (by cehoyos):
* status: new => open
* version: unspecified => git-master
* reproduced: 0 => 1
Comment:
Not a regression afaict.
{{{
$ ffmpeg -i fate-suite/svq3/Vertical400kbit.sorenson3.mov out.mp2
}}}
{{{
$ ffmpeg -filter_complex "amovie=out.mp2, atrim=start=0:end=10,
afade=t=in:st=0:d=2, afade=t=out:st=8:d=2" out.wav
ffmpeg version N-66242-g453944c Copyright (c) 2000-2014 the FFmpeg
developers
built on Sep 12 2014 00:49:57 with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl
libavutil 54. 7.100 / 54. 7.100
libavcodec 56. 1.100 / 56. 1.100
libavformat 56. 4.101 / 56. 4.101
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 1.100 / 5. 1.100
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
[mp3 @ 0x33cfea0] Estimating duration from bitrate, this may be inaccurate
Output #0, wav, to 'out.wav':
Metadata:
ISFT : Lavf56.4.101
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, mono,
s16, 705 kb/s (default)
Metadata:
encoder : Lavc56.1.100 pcm_s16le
Stream mapping:
afade -> Stream #0:0 (pcm_s16le)
Press [q] to stop, [?] for help
size= 861kB time=00:00:10.00 bitrate= 705.7kbits/s
video:0kB audio:861kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.008844%
}}}
The output file is not silent if the intermediate file is a wav file or
the original mov.
If ac3 is used as intermediate format, the effect is even worse: The
output file starts loud and gets silent after two seconds.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/3942#comment:1>
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