[FFmpeg-trac] #7846(undetermined:new): AAC -f lavfi or -filter_complex aevalsrc exceed the specified time
FFmpeg
trac at avcodec.org
Tue Apr 16 23:07:38 EEST 2019
#7846: AAC -f lavfi or -filter_complex aevalsrc exceed the specified time
-------------------------------------+-------------------------------------
Reporter: vsc55 | Type: defect
Status: new | Priority: normal
Component: | Version: git-
undetermined | master
Keywords: aac lavfi | Blocked By:
filter_complex |
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug: When generating a silence with "-f lavfi -t 5" or with
"-filter_complex" aevalsrc = 0: d = 5 "" of 5 seconds it generates a
silence of 10 seconds, this happens with the encoding of AAC, if you
generate a AC3 or WAV is generated correctly.
Also, if you try to concatenate a silence with an audio file, add a few
seconds between both audios.
How to reproduce:
{{{
ffmpeg started on 2019-04-16 at 21:01:32
Report written to "ffmpeg-20190416-210132.log"
Command line:
".\\ffmpeg.exe" -report -f lavfi -t 5 -v 9 -loglevel 99 -i anullsrc
silence.aac
ffmpeg version N-93580-g036b4b0f85 Copyright (c) 2000-2019 the FFmpeg
developers
built with gcc 8.3.1 (GCC) 20190414
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-
fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-
libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr
--enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack
--enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2
--enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-
libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa
--enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx
--enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-
nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
libavutil 56. 26.100 / 56. 26.100
libavcodec 58. 51.100 / 58. 51.100
libavformat 58. 27.102 / 58. 27.102
libavdevice 58. 7.100 / 58. 7.100
libavfilter 7. 48.100 / 7. 48.100
libswscale 5. 4.100 / 5. 4.100
libswresample 3. 4.100 / 3. 4.100
libpostproc 55. 4.100 / 55. 4.100
Splitting the commandline.
Reading option '-report' ... matched as option 'report' (generate a
report) with argument '1'.
Reading option '-f' ... matched as option 'f' (force format) with argument
'lavfi'.
Reading option '-t' ... matched as option 't' (record or transcode
"duration" seconds of audio/video) with argument '5'.
Reading option '-v' ... matched as option 'v' (set logging level) with
argument '9'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging
level) with argument '99'.
Reading option '-i' ... matched as input url with argument 'anullsrc'.
Reading option 'silence.aac' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option report (generate a report) with argument 1.
Applying option v (set logging level) with argument 9.
Applying option loglevel (set logging level) with argument 99.
Successfully parsed a group of options.
Parsing a group of options: input url anullsrc.
Applying option f (force format) with argument lavfi.
Applying option t (record or transcode "duration" seconds of audio/video)
with argument 5.
Successfully parsed a group of options.
Opening an input file: anullsrc.
detected 8 logical cores
[AVFilterGraph @ 000002590e83ca40] query_formats: 2 queried, 3 merged, 0
already done, 0 delayed
[Parsed_anullsrc_0 @ 000002590e83ce40] sample_rate:44100
channel_layout:'stereo' nb_samples:1024
[lavfi @ 000002590e83b580] All info found
Input #0, lavfi, from 'anullsrc':
Duration: N/A, start: 0.000000, bitrate: 705 kb/s
Stream #0:0, 1, 1/44100: Audio: pcm_u8, 44100 Hz, stereo, u8, 705 kb/s
Successfully opened the file.
Parsing a group of options: output url silence.aac.
Successfully parsed a group of options.
Opening an output file: silence.aac.
[file @ 000002590e8cf180] Setting default whitelist 'file,crypto'
Successfully opened the file.
Stream mapping:
Stream #0:0 -> #0:0 (pcm_u8 (native) -> aac (native))
Press [q] to stop, [?] for help
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
[graph_0_in_0_0 @ 000002590ec90f80] Setting 'time_base' to value '1/44100'
[graph_0_in_0_0 @ 000002590ec90f80] Setting 'sample_rate' to value '44100'
[graph_0_in_0_0 @ 000002590ec90f80] Setting 'sample_fmt' to value 'u8'
[graph_0_in_0_0 @ 000002590ec90f80] Setting 'channel_layout' to value
'0x3'
[graph_0_in_0_0 @ 000002590ec90f80] tb:1/44100 samplefmt:u8
samplerate:44100 chlayout:0x3
[format_out_0_0 @ 000002590e8d3d80] Setting 'sample_fmts' to value 'fltp'
[format_out_0_0 @ 000002590e8d3d80] Setting 'sample_rates' to value
'96000|88200|64000|48000|44100|32000|24000|22050|16000|12000|11025|8000|7350'
[format_out_0_0 @ 000002590e8d3d80] auto-inserting filter
'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter
'format_out_0_0'
[AVFilterGraph @ 000002590e8cfe80] query_formats: 5 queried, 9 merged, 3
already done, 0 delayed
[auto_resampler_0 @ 000002590e8d4340] [SWR @ 000002590e8d5840] Using s16p
internally between filters
[auto_resampler_0 @ 000002590e8d4340] ch:2 chl:stereo fmt:u8 r:44100Hz ->
ch:2 chl:stereo fmt:fltp r:44100Hz
Output #0, adts, to 'silence.aac':
Metadata:
encoder : Lavf58.27.102
Stream #0:0, 0, 1/44100: Audio: aac (LC), 44100 Hz, stereo, fltp,
delay 1024, 128 kb/s
Metadata:
encoder : Lavc58.51.100 aac
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
[out_0_0 @ 000002590e8d3bc0] EOF on sink link out_0_0:default.
No more output streams to write to, finishing.
[aac @ 000002590e843cc0] Trying to remove 684 more samples than there are
in the queue
size= 3kB time=00:00:05.01 bitrate= 4.5kbits/s speed=100x
video:0kB audio:1kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 115.163002%
Input file #0 (anullsrc):
Input stream #0:0 (audio): 217 packets read (444416 bytes); 217 frames
decoded (222208 samples);
Total: 217 packets (444416 bytes) demuxed
Output file #0 (silence.aac):
Output stream #0:0 (audio): 216 frames encoded (220500 samples); 217
packets muxed (1319 bytes);
Total: 217 packets (1319 bytes) muxed
217 frames successfully decoded, 0 decoding errors
[AVIOContext @ 000002590e8cf240] Statistics: 0 seeks, 1 writeouts
[aac @ 000002590e843cc0] Qavg: 65536.000
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/7846>
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