[FFmpeg-trac] #8467(undetermined:new): Audio artefacts encoding AAC
FFmpeg
trac at avcodec.org
Mon Jan 13 17:27:53 EET 2020
#8467: Audio artefacts encoding AAC
-------------------------------------+-------------------------------------
Reporter: kmamal | Owner:
Type: defect | Status: new
Priority: normal | Component:
| undetermined
Version: git-master | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Comment (by kmamal):
The sample file is used by our installations team to test audio levels
across speakers in a studio. It's should be a flat tone. Do you prefer
attachments? I'll attach it now.
Here's also the contents of ffmpeg-20200113-155239.log for the command
line and console output:
{{{
ffmpeg started on 2020-01-13 at 15:52:39
Report written to "ffmpeg-20200113-155239.log"
Log level: 48
Command line:
/home/kostis/ffmpeg_build/bin/ffmpeg -report -i in.mp4 -f hls -hls_flags
single_file out.m3u8 -y
ffmpeg version N-96334-g1a7f4a1 Copyright (c) 2000-2020 the FFmpeg
developers
built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
configuration: --prefix=/home/kostis/ffmpeg_build/out --pkg-config-
flags=--static --extra-cflags=-I/home/kostis/ffmpeg_build/out/include
--extra-ldflags=-L/home/kostis/ffmpeg_build/out/lib --extra-
libs='-lpthread -lm' --bindir=/home/kostis/ffmpeg_build/bin --enable-gpl
--enable-libass --enable-libfdk-aac --enable-libfreetype --enable-
libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-
libx264 --enable-libx265 --enable-nonfree
libavutil 56. 38.100 / 56. 38.100
libavcodec 58. 65.103 / 58. 65.103
libavformat 58. 35.102 / 58. 35.102
libavdevice 58. 9.103 / 58. 9.103
libavfilter 7. 71.100 / 7. 71.100
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
Splitting the commandline.
Reading option '-report' ... matched as option 'report' (generate a
report) with argument '1'.
Reading option '-i' ... matched as input url with argument 'in.mp4'.
Reading option '-f' ... matched as option 'f' (force format) with argument
'hls'.
Reading option '-hls_flags' ... matched as AVOption 'hls_flags' with
argument 'single_file'.
Reading option 'out.m3u8' ... matched as output url.
Reading option '-y' ... matched as option 'y' (overwrite output files)
with argument '1'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option report (generate a report) with argument 1.
Applying option y (overwrite output files) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input url in.mp4.
Successfully parsed a group of options.
Opening an input file: in.mp4.
[NULL @ 0x56209c726140] Opening 'in.mp4' for reading
[file @ 0x56209c728340] Setting default whitelist 'file,crypto'
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x56209c726140] Format mov,mp4,m4a,3gp,3g2,mj2
probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x56209c726140] ISO: File Type Major Brand:
isom
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x56209c726140] Unknown dref type 0x206c7275
size 12
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x56209c726140] Processing st: 0, edit list 0 -
media time: 0, duration: 441353
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x56209c726140] Before
avformat_find_stream_info() pos: 238009 bytes read:35244 seeks:1
nb_streams:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x56209c726140] All info found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x56209c726140] After
avformat_find_stream_info() pos: 50 bytes read:68012 seeks:2 frames:1
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'in.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2mp41
encoder : Lavf58.29.100
Duration: 00:00:10.01, start: 0.000000, bitrate: 190 kb/s
Stream #0:0(und), 1, 1/44100: Audio: aac (LC) (mp4a / 0x6134706D),
44100 Hz, stereo, fltp, 188 kb/s (default)
Metadata:
handler_name : SoundHandler
Successfully opened the file.
Parsing a group of options: output url out.m3u8.
Applying option f (force format) with argument hls.
Successfully parsed a group of options.
Opening an output file: out.m3u8.
Successfully opened the file.
Stream mapping:
Stream #0:0 -> #0:0 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless
if it occurs once at the start per stream)
detected 8 logical cores
[graph_0_in_0_0 @ 0x56209c7e5e40] Setting 'time_base' to value '1/44100'
[graph_0_in_0_0 @ 0x56209c7e5e40] Setting 'sample_rate' to value '44100'
[graph_0_in_0_0 @ 0x56209c7e5e40] Setting 'sample_fmt' to value 'fltp'
[graph_0_in_0_0 @ 0x56209c7e5e40] Setting 'channel_layout' to value '0x3'
[graph_0_in_0_0 @ 0x56209c7e5e40] tb:1/44100 samplefmt:fltp
samplerate:44100 chlayout:0x3
[format_out_0_0 @ 0x56209c7e64c0] Setting 'sample_fmts' to value 'fltp'
[format_out_0_0 @ 0x56209c7e64c0] Setting 'sample_rates' to value
'96000|88200|64000|48000|44100|32000|24000|22050|16000|12000|11025|8000|7350'
[AVFilterGraph @ 0x56209c755ac0] query_formats: 4 queried, 9 merged, 0
already done, 0 delayed
[hls @ 0x56209c741180] Opening 'out.ts' for writing
[file @ 0x56209c885b40] Setting default whitelist 'file,crypto'
[mpegts @ 0x56209c7e73c0] frame size not set
[mpegts @ 0x56209c7e73c0] service 1 using PCR in pid=256, pcr_period=93ms
[mpegts @ 0x56209c7e73c0] muxrate VBR, sdt every 1073741822000 ms, pat/pmt
every 1073741822000 ms
Output #0, hls, to 'out.m3u8':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2mp41
encoder : Lavf58.35.102
Stream #0:0(und), 0, 1/90000: Audio: aac (LC), 44100 Hz, stereo, fltp,
128 kb/s (default)
Metadata:
handler_name : SoundHandler
encoder : Lavc58.65.103 aac
cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless
if it occurs once at the start per stream)
[hls @ 0x56209c741180] Opening 'out.m3u8.tmp' for writing
[file @ 0x56209c8d4880] Setting default whitelist 'file,crypto'
EXT-X-MEDIA-SEQUENCE:0
[AVIOContext @ 0x56209c8d2780] Statistics: 0 seeks, 1 writeouts
[hls @ 0x56209c741180] Opening 'out.m3u8.tmp' for writing
[file @ 0x56209c8da540] Setting default whitelist 'file,crypto'
EXT-X-MEDIA-SEQUENCE:0
[AVIOContext @ 0x56209c8d4880] Statistics: 0 seeks, 1 writeouts
[hls @ 0x56209c741180] Opening 'out.m3u8.tmp' for writing
[file @ 0x56209c8da540] Setting default whitelist 'file,crypto'
EXT-X-MEDIA-SEQUENCE:0
[AVIOContext @ 0x56209c8d4880] Statistics: 0 seeks, 1 writeouts
[hls @ 0x56209c741180] Opening 'out.m3u8.tmp' for writing
[file @ 0x56209c8da540] Setting default whitelist 'file,crypto'
EXT-X-MEDIA-SEQUENCE:0
[AVIOContext @ 0x56209c8e5680] Statistics: 0 seeks, 1 writeouts
[out_0_0 @ 0x56209c7e6e40] EOF on sink link out_0_0:default.
No more output streams to write to, finishing.
[hls @ 0x56209c741180] Opening 'out.m3u8.tmp' for writing
[file @ 0x56209c8ede40] Setting default whitelist 'file,crypto'
EXT-X-MEDIA-SEQUENCE:0
[AVIOContext @ 0x56209c8e5680] Statistics: 0 seeks, 1 writeouts
[AVIOContext @ 0x56209c8c5c80] Statistics: 0 seeks, 6 writeouts
[hls @ 0x56209c741180] Opening 'out.m3u8.tmp' for writing
[file @ 0x56209c8da540] Setting default whitelist 'file,crypto'
EXT-X-MEDIA-SEQUENCE:0
[AVIOContext @ 0x56209c8e5680] Statistics: 0 seeks, 1 writeouts
size=N/A time=00:00:10.00 bitrate=N/A speed=61.8x
video:0kB audio:159kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
Input file #0 (in.mp4):
Input stream #0:0 (audio): 431 packets read (235489 bytes); 431 frames
decoded (441344 samples);
Total: 431 packets (235489 bytes) demuxed
Output file #0 (out.m3u8):
Output stream #0:0 (audio): 431 frames encoded (441344 samples); 432
packets muxed (162595 bytes);
Total: 432 packets (162595 bytes) muxed
431 frames successfully decoded, 0 decoding errors
[aac @ 0x56209c72f180] Qavg: 631.204
[AVIOContext @ 0x56209c730700] Statistics: 273209 bytes read, 2 seeks
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/8467#comment:2>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
More information about the FFmpeg-trac
mailing list