[FFmpeg-trac] #3803(undetermined:new): Incorrect bitrate in RIFF header when wrapping dts in WAV
FFmpeg
trac at avcodec.org
Fri Jul 25 15:19:08 CEST 2014
#3803: Incorrect bitrate in RIFF header when wrapping dts in WAV
-------------------------------------+-------------------------------------
Reporter: ptalarbvorm | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: unspecified | undetermined
Keywords: | Resolution:
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
-------------------------------------+-------------------------------------
Comment (by ptalarbvorm):
1) Okay, I've just uploaded two files to the FTP server,
"cdtrack-264.6kbps-dts.txt" and "cdtrack-264.6kbps-dts.wav"
2)
=>ffmpeg -i cdtrack264kbps.dts
ffmpeg version N-63746-gfbaf73a Copyright (c) 2000-2014 the FFmpeg
developers
built on Jun 3 2014 22:02:00 with gcc 4.8.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
--enable-gnutls --enable-iconv --enable-libass --enable-libbluray
--enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm
--enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-
libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-libopus --enable-librtmp --enable-libschroedinger --enable-
libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-
libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-
libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-
libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-
decklink --enable-zlib
libavutil 52. 89.100 / 52. 89.100
libavcodec 55. 66.100 / 55. 66.100
libavformat 55. 42.100 / 55. 42.100
libavdevice 55. 13.101 / 55. 13.101
libavfilter 4. 5.100 / 4. 5.100
libswscale 2. 6.100 / 2. 6.100
libswresample 0. 19.100 / 0. 19.100
libpostproc 52. 3.100 / 52. 3.100
[dts @ 02ec25a0] Estimating duration from bitrate, this may be inaccurate
Input #0, dts, from 'cdtrack264kbps.dts':
Duration: 00:01:29.24, start: 0.000000, bitrate: 320 kb/s
Stream #0:0: Audio: dts (DTS), 44100 Hz, stereo, fltp, 320 kb/s
===========================================================================
=>ffmpeg -i cdtrack264kbps.dts -acodec copy cdtrack-264.6kbps-dts.wav
ffmpeg version N-63746-gfbaf73a Copyright (c) 2000-2014 the FFmpeg
developers
built on Jun 3 2014 22:02:00 with gcc 4.8.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
--enable-gnutls --enable-iconv --enable-libass --enable-libbluray
--enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm
--enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-
libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-libopus --enable-librtmp --enable-libschroedinger --enable-
libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-
libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-
libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-
libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-
decklink --enable-zlib
libavutil 52. 89.100 / 52. 89.100
libavcodec 55. 66.100 / 55. 66.100
libavformat 55. 42.100 / 55. 42.100
libavdevice 55. 13.101 / 55. 13.101
libavfilter 4. 5.100 / 4. 5.100
libswscale 2. 6.100 / 2. 6.100
libswresample 0. 19.100 / 0. 19.100
libpostproc 52. 3.100 / 52. 3.100
[dts @ 02ddacc0] Estimating duration from bitrate, this may be inaccurate
Input #0, dts, from 'cdtrack264kbps.dts':
Duration: 00:01:29.24, start: 0.000000, bitrate: 320 kb/s
Stream #0:0: Audio: dts (DTS), 44100 Hz, stereo, fltp, 320 kb/s
Output #0, wav, to 'cdtrack-264.6kbps-dts.wav':
Metadata:
ISFT : Lavf55.42.100
Stream #0:0: Audio: dts ([1] [0][0] / 0x2001), 44100 Hz, stereo, 320 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
size= 3486kB time=00:01:47.82 bitrate= 264.9kbits/s
video:0kB audio:3486kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.002577%
3) «Please explain why the incorrect bitrate is a problem.»
** Because it's the WRONG way to do the thing. **
--
Ticket URL: <https://trac.ffmpeg.org/ticket/3803#comment:2>
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