#3723: aac copy issue with -bsf:a aac_adtstoasc when container is not flv, m4a,
mov or mp4
-------------------------------------+-------------------------------------
Reporter: feelart | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: git-master | undetermined
Keywords: | Resolution:
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
-------------------------------------+-------------------------------------
Comment (by feelart):
I do wish not to use the bitstream filter, I'd rather prefer it is left
internally.
However, as I understood it is a must requirement for m4a, flv, mp4 and
mov.
As I understand, bsf is a mutual exclusive flag: you must use it on
certain containers (m4a, flv, mp4 and mov), but must not on all others.
In the following CLI, ffmpeg clearly mentions "Conversion failed!" and no
empty output (1 Kb)is created.
While in 1st example, namely:
{{{
>ffmpeg -i aac_test.aac -c:a copy -bsf:a aac_adtstoasc
aac_try_with_bsf.aac
}}}
ffmpeg ought to exist, but currently does not and more prone to error
creates an apparently good output.
This is either a feature enhancement or bug.
{{{
E:\_PS\dbtest\mm_audio_codec>ffmpeg -i aac_test.aac -c:a copy
aac_try_with_bsf.mp4
ffmpeg version N-63968-g73d820e Copyright (c) 2000-2014 the FFmpeg
developers
built on Jun 15 2014 00:52:21 with gcc 4.8.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --enable-bzlib --enable-fo
ntconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass
--enable-libbluray --enable-libcaca --ena
ble-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-
libmodplug --enable-libmp3lame --enable
-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-libopus --enable-librtmp --enable-lib
schroedinger --enable-libsoxr --enable-libspeex --enable-libtheora
--enable-libtwolame --enable-libvidstab --enab
le-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. 66.101 / 55. 66.101
libavformat 55. 43.100 / 55. 43.100
libavdevice 55. 13.101 / 55. 13.101
libavfilter 4. 8.100 / 4. 8.100
libswscale 2. 6.100 / 2. 6.100
libswresample 0. 19.100 / 0. 19.100
libpostproc 52. 3.100 / 52. 3.100
[aac @ 0000000000318320] Estimating duration from bitrate, this may be
inaccurate
Input #0, aac, from 'aac_test.aac':
Duration: 00:00:14.72, bitrate: 124 kb/s
Stream #0:0: Audio: aac, 44100 Hz, stereo, fltp, 124 kb/s
Output #0, mp4, to 'aac_try_with_bsf.mp4':
Metadata:
encoder : Lavf55.43.100
Stream #0:0: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo,
124 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[mp4 @ 0000000004ee42e0] Malformed AAC bitstream detected: use audio
bitstream filter 'aac_adtstoasc' to fix it (
'-bsf:a aac_adtstoasc' option with ffmpeg)
av_interleaved_write_frame(): Operation not permitted
size= 0kB time=00:00:00.02 bitrate= 88.9kbits/s
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
Conversion failed!
E:\_PS\dbtest\mm_audio_codec>
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/3723#comment:2>
FFmpeg <https://ffmpeg.org>
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