[FFmpeg-trac] #6937(undetermined:new): When converting from APE program eats up 4 bytes.
FFmpeg
trac at avcodec.org
Fri Dec 29 21:00:58 EET 2017
#6937: When converting from APE program eats up 4 bytes.
-------------------------------------+-------------------------------------
Reporter: sokoloff | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: unspecified | undetermined
Keywords: APE | Resolution:
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
-------------------------------------+-------------------------------------
Comment (by sokoloff):
>Is the issue you want to report reproducible with current FFmpeg git
head?
Yes this bug is reproduced on 0c78b6a416c661afed745d44495b5194f714fb96
commit.
{{{
[sokoloff at sokoloff-home 2]$ ./ffmpeg -y -t 60 -f s16le -i /dev/urandom -ar
44100 -acodec pcm_s16le -ac 2 in.wav
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 : mono
Input #0, s16le, from '/dev/urandom':
Duration: N/A, bitrate: 705 kb/s
Stream #0:0: Audio: pcm_s16le, 44100 Hz, mono, s16, 705 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
Output #0, wav, to 'in.wav':
Metadata:
ISFT : Lavf58.3.100
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz,
stereo, s16, 1411 kb/s
Metadata:
encoder : Lavc58.9.100 pcm_s16le
size= 10336kB time=00:01:00.00 bitrate=1411.2kbits/s speed= 219x
video:0kB audio:10336kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.000737%
[sokoloff at sokoloff-home 2]$ mac in.wav in.ape -c2000
--- Monkey's Audio Console Front End (v 4.11) (c) Matthew T. Ashland ---
Compressing (normal)...
Progress: 100.0% (0.0 seconds remaining, 0.2 seconds total)
Success...
[sokoloff at sokoloff-home 2]$ ffmpeg -y -accurate_seek -ss 5 -t 30 -i in.wav
-f wav from_wav.wav
ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 4.9.4 (Linaro GCC 4.9-2017.01) 20160726 (ROSA)
configuration: --prefix=/usr --enable-shared --libdir=/usr/lib64
--shlibdir=/usr/lib64 --incdir=/usr/include --disable-stripping --enable-
postproc --enable-gpl --enable-pthreads --enable-ladspa --enable-libbluray
--enable-libtheora --enable-libvorbis --disable-encoder=vorbis --enable-
libvpx --enable-x11grab --enable-runtime-cpudetect --enable-libdc1394
--enable-libschroedinger --enable-librtmp --enable-libspeex --enable-
libfreetype --enable-libnut --enable-libgsm --enable-libcelt --enable-
avresample --enable-opencl --disable-libopencv --enable-libopenjpeg
--enable-libopus --enable-libsoxr --enable-libwavpack --disable-libxavs
--enable-libmodplug --enable-libass --enable-gnutls --enable-libcdio
--enable-libpulse --enable-libv4l2 --enable-libmp3lame --enable-
libopencore-amrnb --enable-libopencore-amrwb --enable-version3 --enable-
libx264 --enable-libx265 --enable-libvo-amrwbenc --enable-libxvid
libavutil 55. 34.101 / 55. 34.101
libavcodec 57. 64.101 / 57. 64.101
libavformat 57. 56.101 / 57. 56.101
libavdevice 57. 1.100 / 57. 1.100
libavfilter 6. 65.100 / 6. 65.100
libavresample 3. 1. 0 / 3. 1. 0
libswscale 4. 2.100 / 4. 2.100
libswresample 2. 3.100 / 2. 3.100
libpostproc 54. 1.100 / 54. 1.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, wav, from 'in.wav':
Metadata:
encoder : Lavf58.3.100
Duration: 00:01:00.00, bitrate: 1411 kb/s
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz,
stereo, s16, 1411 kb/s
Output #0, wav, to 'from_wav.wav':
Metadata:
ISFT : Lavf57.56.101
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz,
stereo, s16, 1411 kb/s
Metadata:
encoder : Lavc57.64.101 pcm_s16le
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
size= 5168kB time=00:00:30.00 bitrate=1411.2kbits/s speed=1.52e+03x
video:0kB audio:5168kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.001474%
[sokoloff at sokoloff-home 2]$ ffmpeg -y -accurate_seek -ss 5 -t 30 -i in.ape
-f wav from_ape.wav
ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 4.9.4 (Linaro GCC 4.9-2017.01) 20160726 (ROSA)
configuration: --prefix=/usr --enable-shared --libdir=/usr/lib64
--shlibdir=/usr/lib64 --incdir=/usr/include --disable-stripping --enable-
postproc --enable-gpl --enable-pthreads --enable-ladspa --enable-libbluray
--enable-libtheora --enable-libvorbis --disable-encoder=vorbis --enable-
libvpx --enable-x11grab --enable-runtime-cpudetect --enable-libdc1394
--enable-libschroedinger --enable-librtmp --enable-libspeex --enable-
libfreetype --enable-libnut --enable-libgsm --enable-libcelt --enable-
avresample --enable-opencl --disable-libopencv --enable-libopenjpeg
--enable-libopus --enable-libsoxr --enable-libwavpack --disable-libxavs
--enable-libmodplug --enable-libass --enable-gnutls --enable-libcdio
--enable-libpulse --enable-libv4l2 --enable-libmp3lame --enable-
libopencore-amrnb --enable-libopencore-amrwb --enable-version3 --enable-
libx264 --enable-libx265 --enable-libvo-amrwbenc --enable-libxvid
libavutil 55. 34.101 / 55. 34.101
libavcodec 57. 64.101 / 57. 64.101
libavformat 57. 56.101 / 57. 56.101
libavdevice 57. 1.100 / 57. 1.100
libavfilter 6. 65.100 / 6. 65.100
libavresample 3. 1. 0 / 3. 1. 0
libswscale 4. 2.100 / 4. 2.100
libswresample 2. 3.100 / 2. 3.100
libpostproc 54. 1.100 / 54. 1.100
Input #0, ape, from 'in.ape':
Duration: 00:01:00.00, start: 0.000000, bitrate: 699 kb/s
Stream #0:0: Audio: ape (APE / 0x20455041), 44100 Hz, stereo, s16p
Output #0, wav, to 'from_ape.wav':
Metadata:
ISFT : Lavf57.56.101
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz,
stereo, s16, 1411 kb/s
Metadata:
encoder : Lavc57.64.101 pcm_s16le
Stream mapping:
Stream #0:0 -> #0:0 (ape (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
size= 5168kB time=00:00:30.00 bitrate=1411.2kbits/s speed= 391x
video:0kB audio:5168kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.001474%
[sokoloff at sokoloff-home 2]$ ls -l from_wav.wav from_ape.wav
-rw-rw-r-- 1 sokoloff sokoloff 5292074 дек 29 21:46 from_ape.wav
-rw-rw-r-- 1 sokoloff sokoloff 5292078 дек 29 21:45 from_wav.wav
}}}
Files have different length.
Size of from_ape.wav is incorrect, it should be 5292078 bytes 78 (header)
+ 5292000 (data) (44100 * 2 channel * 2 byte per sec. * 30 seconds)
--
Ticket URL: <https://trac.ffmpeg.org/ticket/6937#comment:2>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
More information about the FFmpeg-trac
mailing list