[FFmpeg-trac] #6937(undetermined:new): When converting from APE program eats up 4 bytes.
FFmpeg
trac at avcodec.org
Sat Dec 30 16:07:38 EET 2017
#6937: When converting from APE program eats up 4 bytes.
-------------------------------------+-------------------------------------
Reporter: sokoloff | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: git-master | undetermined
Keywords: APE seek | Resolution:
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
-------------------------------------+-------------------------------------
Comment (by sokoloff):
>Since this is not generally true, it makes sense to do such tests with
raw pcm (.sw).
No problem.
{{{
[sokoloff at sokoloff-home bug]$ for format in ape wav flac tta wv; do
./ffmpeg -y -accurate_seek -ss 5 -t 30 -i in.${format} -f s16le
from_${format}.sw; done
ffmpeg version N-89656-g0c78b6a416 Copyright (c) 2000-2017 the FFmpeg
developers
built with gcc 4.9.4 (Linaro GCC 4.9-2017.01) 20160726 (ROSA)
configuration:
libavutil 56. 7.100 / 56. 7.100
libavcodec 58. 9.100 / 58. 9.100
libavformat 58. 3.100 / 58. 3.100
libavdevice 58. 0.100 / 58. 0.100
libavfilter 7. 8.100 / 7. 8.100
libswscale 5. 0.101 / 5. 0.101
libswresample 3. 0.101 / 3. 0.101
Input #0, ape, from 'in.ape':
Duration: 00:09:34.00, start: 0.000000, bitrate: 699 kb/s
Stream #0:0: Audio: ape (APE / 0x20455041), 44100 Hz, stereo, s16p
Stream mapping:
Stream #0:0 -> #0:0 (ape (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
Output #0, s16le, to 'from_ape.sw':
Metadata:
encoder : Lavf58.3.100
Stream #0:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
Metadata:
encoder : Lavc58.9.100 pcm_s16le
size= 5168kB time=00:00:30.00 bitrate=1411.2kbits/s speed= 236x
video:0kB audio:5168kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.000000%
ffmpeg version N-89656-g0c78b6a416 Copyright (c) 2000-2017 the FFmpeg
developers
built with gcc 4.9.4 (Linaro GCC 4.9-2017.01) 20160726 (ROSA)
configuration:
libavutil 56. 7.100 / 56. 7.100
libavcodec 58. 9.100 / 58. 9.100
libavformat 58. 3.100 / 58. 3.100
libavdevice 58. 0.100 / 58. 0.100
libavfilter 7. 8.100 / 7. 8.100
libswscale 5. 0.101 / 5. 0.101
libswresample 3. 0.101 / 3. 0.101
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, wav, from 'in.wav':
Metadata:
encoder : Lavf57.56.101
Duration: 00:09:34.00, bitrate: 1411 kb/s
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz,
stereo, s16, 1411 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
Output #0, s16le, to 'from_wav.sw':
Metadata:
encoder : Lavf58.3.100
Stream #0:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
Metadata:
encoder : Lavc58.9.100 pcm_s16le
size= 5168kB time=00:00:30.00 bitrate=1411.2kbits/s speed=1.32e+03x
video:0kB audio:5168kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.000000%
ffmpeg version N-89656-g0c78b6a416 Copyright (c) 2000-2017 the FFmpeg
developers
built with gcc 4.9.4 (Linaro GCC 4.9-2017.01) 20160726 (ROSA)
configuration:
libavutil 56. 7.100 / 56. 7.100
libavcodec 58. 9.100 / 58. 9.100
libavformat 58. 3.100 / 58. 3.100
libavdevice 58. 0.100 / 58. 0.100
libavfilter 7. 8.100 / 7. 8.100
libswscale 5. 0.101 / 5. 0.101
libswresample 3. 0.101 / 3. 0.101
Input #0, flac, from 'in.flac':
Duration: 00:09:34.00, start: 0.000000, bitrate: 704 kb/s
Stream #0:0: Audio: flac, 44100 Hz, stereo, s16
Stream mapping:
Stream #0:0 -> #0:0 (flac (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
Output #0, s16le, to 'from_flac.sw':
Metadata:
encoder : Lavf58.3.100
Stream #0:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
Metadata:
encoder : Lavc58.9.100 pcm_s16le
size= 5168kB time=00:00:30.00 bitrate=1411.2kbits/s speed=1.79e+03x
video:0kB audio:5168kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.000000%
ffmpeg version N-89656-g0c78b6a416 Copyright (c) 2000-2017 the FFmpeg
developers
built with gcc 4.9.4 (Linaro GCC 4.9-2017.01) 20160726 (ROSA)
configuration:
libavutil 56. 7.100 / 56. 7.100
libavcodec 58. 9.100 / 58. 9.100
libavformat 58. 3.100 / 58. 3.100
libavdevice 58. 0.100 / 58. 0.100
libavfilter 7. 8.100 / 7. 8.100
libswscale 5. 0.101 / 5. 0.101
libswresample 3. 0.101 / 3. 0.101
Input #0, tta, from 'in.tta':
Duration: 00:09:34.00, start: 0.000000, bitrate: 754 kb/s
Stream #0:0: Audio: tta, 44100 Hz, stereo, s16
Stream mapping:
Stream #0:0 -> #0:0 (tta (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
Output #0, s16le, to 'from_tta.sw':
Metadata:
encoder : Lavf58.3.100
Stream #0:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
Metadata:
encoder : Lavc58.9.100 pcm_s16le
size= 5168kB time=00:00:30.00 bitrate=1411.2kbits/s speed=1.37e+03x
video:0kB audio:5168kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.000000%
ffmpeg version N-89656-g0c78b6a416 Copyright (c) 2000-2017 the FFmpeg
developers
built with gcc 4.9.4 (Linaro GCC 4.9-2017.01) 20160726 (ROSA)
configuration:
libavutil 56. 7.100 / 56. 7.100
libavcodec 58. 9.100 / 58. 9.100
libavformat 58. 3.100 / 58. 3.100
libavdevice 58. 0.100 / 58. 0.100
libavfilter 7. 8.100 / 7. 8.100
libswscale 5. 0.101 / 5. 0.101
libswresample 3. 0.101 / 3. 0.101
Input #0, wv, from 'in.wv':
Duration: 00:09:34.00, start: 0.000000, bitrate: 762 kb/s
Stream #0:0: Audio: wavpack, 44100 Hz, stereo, s16p
Stream mapping:
Stream #0:0 -> #0:0 (wavpack (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
Output #0, s16le, to 'from_wv.sw':
Metadata:
encoder : Lavf58.3.100
Stream #0:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
Metadata:
encoder : Lavc58.9.100 pcm_s16le
size= 5168kB time=00:00:30.00 bitrate=1411.2kbits/s speed=1.05e+03x
video:0kB audio:5168kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.000000%
[sokoloff at sokoloff-home bug]$ ls -l from_*.sw
-rw-rw-r-- 1 sokoloff sokoloff 5291996 дек 30 17:05 from_ape.sw
-rw-rw-r-- 1 sokoloff sokoloff 5292000 дек 30 17:05 from_flac.sw
-rw-rw-r-- 1 sokoloff sokoloff 5292000 дек 30 17:05 from_tta.sw
-rw-rw-r-- 1 sokoloff sokoloff 5292000 дек 30 17:05 from_wav.sw
-rw-rw-r-- 1 sokoloff sokoloff 5292000 дек 30 17:05 from_wv.sw
--
Ticket URL: <https://trac.ffmpeg.org/ticket/6937#comment:6>
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