[FFmpeg-trac] #5070(undetermined:new): Lot of artifacts in AAC encoder and duration is incorrect
FFmpeg
trac at avcodec.org
Sun Dec 6 11:49:34 CET 2015
#5070: Lot of artifacts in AAC encoder and duration is incorrect
-------------------------------------+-------------------------------------
Reporter: d4eva | Type: defect
Status: new | Priority: normal
Component: | Version: git-
undetermined | master
Keywords: aac | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
There are lot of artifacts in the resulting m4a file, also the duration of
the m4a file differs from the original wav file.
How to reproduce:
{{{
ffmpeg started on 2015-12-06 at 12:40:33
Report written to "ffmpeg-20151206-124033.log"
Command line:
"D:\\converted\\output\\ffmpeg.exe" -report -i short.wav -y short.m4a
ffmpeg version 2.8.git Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 5.2.0 (i686-win32-dwarf-rev0, Built by MinGW-W64 project)
configuration: --enable-memalign-hack --extra-cflags=-I/local/include
--extra-ldflags=-L/local/lib --extra-cflags=-U__STRICT_ANSI__ --extra-
ldflags='-static-libgcc -static-libstdc++' --disable-shared --disable-doc
--enable-encoder=aac --enable-static --enable-ffmpeg --enable-ffplay
libavutil 55. 10.100 / 55. 10.100
libavcodec 57. 16.101 / 57. 16.101
libavformat 57. 19.100 / 57. 19.100
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 20.100 / 6. 20.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
Splitting the commandline.
Reading option '-report' ... matched as option 'report' (generate a
report) with argument '1'.
Reading option '-i' ... matched as input file with argument 'short.wav'.
Reading option '-y' ... matched as option 'y' (overwrite output files)
with argument '1'.
Reading option 'short.m4a' ... matched as output file.
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 file short.wav.
Successfully parsed a group of options.
Opening an input file: short.wav.
[wav @ 00a04280] Format wav probed with size=2048 and score=99
[wav @ 00a04280] Before avformat_find_stream_info() pos: 44 bytes
read:36872 seeks:2
[wav @ 00a04280] probing stream 0 pp:32
[wav @ 00a04280] probing stream 0 pp:31
[wav @ 00a04280] probing stream 0 pp:30
[wav @ 00a04280] probing stream 0 pp:29
[wav @ 00a04280] probing stream 0 pp:28
[wav @ 00a04280] probing stream 0 pp:27
[wav @ 00a04280] probing stream 0 pp:26
[wav @ 00a04280] probing stream 0 pp:25
[wav @ 00a04280] probing stream 0 pp:24
[wav @ 00a04280] probing stream 0 pp:23
[wav @ 00a04280] probing stream 0 pp:22
[wav @ 00a04280] probing stream 0 pp:21
[wav @ 00a04280] probing stream 0 pp:20
[wav @ 00a04280] probing stream 0 pp:19
[wav @ 00a04280] probing stream 0 pp:18
[wav @ 00a04280] probing stream 0 pp:17
[wav @ 00a04280] probing stream 0 pp:16
[wav @ 00a04280] probing stream 0 pp:15
[wav @ 00a04280] probing stream 0 pp:14
[wav @ 00a04280] probing stream 0 pp:13
[wav @ 00a04280] probing stream 0 pp:12
[wav @ 00a04280] probing stream 0 pp:11
[wav @ 00a04280] probing stream 0 pp:10
[wav @ 00a04280] probing stream 0 pp:9
[wav @ 00a04280] probing stream 0 pp:8
[wav @ 00a04280] probing stream 0 pp:7
[wav @ 00a04280] probing stream 0 pp:6
[wav @ 00a04280] probing stream 0 pp:5
[wav @ 00a04280] probing stream 0 pp:4
[wav @ 00a04280] probing stream 0 pp:3
[wav @ 00a04280] probing stream 0 pp:2
[wav @ 00a04280] probing stream 0 pp:1
[wav @ 00a04280] probed stream 0
[wav @ 00a04280] parser not found for codec pcm_s16le, packets or times
may be invalid.
[wav @ 00a04280] All info found
[wav @ 00a04280] After avformat_find_stream_info() pos: 204844 bytes
read:266248 seeks:2 frames:50
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, wav, from 'short.wav':
Duration: 00:00:11.79, bitrate: 1414 kb/s
Stream #0:0, 50, 1/44100: Audio: pcm_s16le ([1][0][0][0] / 0x0001),
44100 Hz, 2 channels, s16, 1411 kb/s
Successfully opened the file.
Parsing a group of options: output file short.m4a.
Successfully parsed a group of options.
Opening an output file: short.m4a.
Successfully opened the file.
detected 8 logical cores
[graph 0 input from stream 0:0 @ 00a089a0] Setting 'time_base' to value
'1/44100'
[graph 0 input from stream 0:0 @ 00a089a0] Setting 'sample_rate' to value
'44100'
[graph 0 input from stream 0:0 @ 00a089a0] Setting 'sample_fmt' to value
's16'
[graph 0 input from stream 0:0 @ 00a089a0] Setting 'channel_layout' to
value '0x3'
[graph 0 input from stream 0:0 @ 00a089a0] tb:1/44100 samplefmt:s16
samplerate:44100 chlayout:0x3
[audio format for output stream 0:0 @ 00a0be20] Setting 'sample_fmts' to
value 'fltp'
[audio format for output stream 0:0 @ 00a0be20] Setting 'sample_rates' to
value
'96000|88200|64000|48000|44100|32000|24000|22050|16000|12000|11025|8000|7350'
[audio format for output stream 0:0 @ 00a0be20] auto-inserting filter
'auto-inserted resampler 0' between the filter 'Parsed_anull_0' and the
filter 'audio format for output stream 0:0'
[AVFilterGraph @ 00a0ef20] query_formats: 4 queried, 6 merged, 3 already
done, 0 delayed
[auto-inserted resampler 0 @ 00a0c0e0] [SWR @ 03f12840] Using s16p
internally between filters
[auto-inserted resampler 0 @ 00a0c0e0] ch:2 chl:stereo fmt:s16 r:44100Hz
-> ch:2 chl:stereo fmt:fltp r:44100Hz
Output #0, ipod, to 'short.m4a':
Metadata:
encoder : Lavf57.19.100
Stream #0:0, 0, 1/44100: Audio: aac (mp4a / 0x6134706D), 44100 Hz,
stereo, fltp, 128 kb/s
Metadata:
encoder : Lavc57.16.101 aac
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le (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)
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
size= 110kB time=00:00:07.10 bitrate= 126.7kbits/s
[output stream 0:0 @ 00a0bca0] EOF on sink link output stream 0:0:default.
No more output streams to write to, finishing.
[aac @ 03ed3b00] Trying to remove 324 more samples than there are in the
queue
size= 185kB time=00:00:11.79 bitrate= 128.5kbits/s
video:0kB audio:182kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 1.491890%
Input file #0 (short.wav):
Input stream #0:0 (audio): 508 packets read (2079472 bytes); 508 frames
decoded (519868 samples);
Total: 508 packets (2079472 bytes) demuxed
Output file #0 (short.m4a):
Output stream #0:0 (audio): 508 frames encoded (519868 samples); 509
packets muxed (186676 bytes);
Total: 509 packets (186676 bytes) muxed
508 frames successfully decoded, 0 decoding errors
[AVIOContext @ 03ed3f00] Statistics: 30 seeks, 532 writeouts
[aac @ 03ed3b00] Qavg: 3679.664
[AVIOContext @ 00a080a0] Statistics: 2120448 bytes read, 2 seeks
}}}
Patches should be submitted to the ffmpeg-devel mailing list and not this
bug tracker.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/5070>
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