[FFmpeg-trac] #6175(avcodec:new): IFF Anims starting with audio don't show audio
FFmpeg
trac at avcodec.org
Wed Feb 22 01:49:21 EET 2017
#6175: IFF Anims starting with audio don't show audio
-------------------------------------+----------------------------------
Reporter: MaddTheSane | Type: defect
Status: new | Priority: normal
Component: avcodec | Version: 3.2.1
Keywords: iff anim | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+----------------------------------
Summary of the bug:
If an IFF file starts with an 8SVX structure, FFMpeg thinks the whole file
is an audio file and decodes even the video portions as audio, resorting
in static for a good portion of the audio as it is decoded as audio.
How to reproduce:
{{{
% ffmpeg -i At_the_Movies.anim -c:a pcm_s8 atm1.aiff
% ffprobe At\ the\ Movies\ 1.anim
ffprobe version 3.2.2 Copyright (c) 2007-2016 the FFmpeg developers
built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
configuration: --prefix=/opt/local --enable-swscale --enable-avfilter
--enable-avresample --enable-libmp3lame --enable-libvorbis --enable-
libopus --enable-libtheora --enable-libschroedinger --enable-libopenjpeg
--enable-libmodplug --enable-libvpx --enable-libsoxr --enable-libspeex
--enable-libass --enable-libbluray --enable-lzma --enable-gnutls --enable-
fontconfig --enable-libfreetype --enable-libfribidi --disable-indev=jack
--disable-outdev=xv --enable-audiotoolbox --enable-sdl2
--mandir=/opt/local/share/man --enable-shared --enable-pthreads
--cc=/usr/bin/clang --enable-vda --enable-videotoolbox --arch=x86_64
--enable-yasm --enable-libx265 --enable-gpl --enable-postproc --enable-
libx264 --enable-libxvid
libavutil 55. 34.100 / 55. 34.100
libavcodec 57. 64.101 / 57. 64.101
libavformat 57. 56.100 / 57. 56.100
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
[iff @ 0x7fd367005800] Estimating duration from bitrate, this may be
inaccurate
Input #0, iff, from 'At the Movies 1.anim':
Metadata:
comment : TOROID
Duration: 00:01:21.64, bitrate: 72 kb/s
Stream #0:0: Audio: pcm_s8_planar (ANIM / 0x4D494E41), 9085 Hz, mono,
u8p, 72 kb/s
% file At\ the\ Movies\ 1.anim
At the Movies 1.anim: IFF data, ANIM animation
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/6175>
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