[FFmpeg-trac] #720(avfilter:new): Volume filter does not work
FFmpeg
trac at avcodec.org
Thu Dec 8 06:03:55 CET 2011
#720: Volume filter does not work
-------------------------------------+-------------------------------------
Reporter: | Type: defect
jeremysalwen | Priority: normal
Status: new | Version: git-
Component: avfilter | master
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
What you were trying to accomplish:
Test a libavfilter filter in ffmpeg.
The problem you encountered:
the libavfilter filter "volume" had no effect on the audio.
Console output:
$ ./ffmpeg -v 9 -loglevel 99 -i ~/write.wav -vf volume=0.1 ~/lol.wav
ffmpeg version N-35540-g0cc9949, Copyright (c) 2000-2011 the FFmpeg
developers
built on Dec 7 2011 22:26:02 with gcc 4.6.1
configuration: --enable-filter=earwax
libavutil 51. 30. 0 / 51. 30. 0
libavcodec 53. 41. 2 / 53. 41. 2
libavformat 53. 24. 0 / 53. 24. 0
libavdevice 53. 4. 0 / 53. 4. 0
libavfilter 2. 51. 0 / 2. 51. 0
libswscale 2. 1. 0 / 2. 1. 0
[wav @ 0x2f857e0] Format wav probed with size=2048 and score=99
[pcm_s16le @ 0x2f8bc00] err{or,}_recognition separate: 1; 1
[pcm_s16le @ 0x2f8bc00] err{or,}_recognition combined: 1; 65537
[wav @ 0x2f857e0] parser not found for codec pcm_s16le, packets or times
may be invalid.
[wav @ 0x2f857e0] max_analyze_duration 5000000 reached at 5015510
Input #0, wav, from '/home/jeremy/write.wav':
Duration: 00:04:01.86, bitrate: 1411 kb/s
Stream #0:0, 218, 1/44100: Audio: pcm_s16le ([1][0][0][0] / 0x0001),
44100 Hz, 2 channels, s16, 1411 kb/s
[pcm_s16le @ 0x302d0e0] err{or,}_recognition separate: 1; 1
[pcm_s16le @ 0x302d0e0] err{or,}_recognition combined: 1; 65537
[pcm_s16le @ 0x2f8bc00] err{or,}_recognition separate: 1; 65537
[pcm_s16le @ 0x2f8bc00] err{or,}_recognition combined: 1; 65537
Output #0, wav, to '/home/jeremy/lol.wav':
Metadata:
encoder : Lavf53.24.0
Stream #0:0, 0, 1/44100: Audio: pcm_s16le ([1][0][0][0] / 0x0001),
44100 Hz, 2 channels, s16, 1411 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le -> pcm_s16le)
Press [q] to stop, [?] for help
size= 41665kB time=00:04:01.86 bitrate=1411.2kbits/s
video:0kB audio:41665kB global headers:0kB muxing overhead 0.000108%
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/720>
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