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It must be said that the conditions for this bug to occur are quite strange. When using ffmpeg to output opus, if this opus audio is encapsulated in '.opus' instead of '.mka' or '.mkv', and then MKVToolNix is used to encapsulate this '.opus' file, this bug will occur.
First, use ffmpeg to encode the original audio as opus, and note that the output here is '. opus' ffmpeg -i inputAudio.m4a -c:a libopus -b:a 80k outputAudio.opus
Then use MKVToolNix to package the '. opus' file as mkv or mka
Finally, use LAV Splitter to decode this mkv, the bug will appear.
You will hear instantaneous noise occurring at some times. the_opus_bug_with_lav.zip 2:365:127:4710:2413:00 ......
The volume of each noise is different.
Based on my tests, only LAV Splitter will cause this problem.
Original audio :
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : A_AAC-2
Duration : 23 min 50 s
Bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 44.1 kHz
Frame rate : 43.066 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 21.8 MiB (2%)
Default : Yes
Forced : No
FFmpeg output file (audio.opus) :
General
Format : Ogg
File size : 13.2 MiB
Duration : 23 min 50 s
Overall bit rate : 77.6 kb/s
Writing application : Lavc61.3.100 libopus
BPS-eng : 128000
DURATION-eng : 00:23:50.070000000
NUMBER_OF_FRAMES-eng : 61588
NUMBER_OF_BYTES-eng : 22881130
_STATISTICS_WRITING_APP-eng : no_variable_data
_STATISTICS_WRITING_DATE_UTC-eng : 1970-01-01 00:00:00
_STATISTICS_TAGS-eng : BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Audio
ID : 1779984567 (0x6A1868B7)
Format : Opus
Duration : 23 min 50 s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Compression mode : Lossy
Writing library : Lavf61.1.100
The text was updated successfully, but these errors were encountered:
It must be said that the conditions for this bug to occur are quite strange. When using ffmpeg to output opus, if this opus audio is encapsulated in '.opus' instead of '.mka' or '.mkv', and then MKVToolNix is used to encapsulate this '.opus' file, this bug will occur.
First, use ffmpeg to encode the original audio as opus, and note that the output here is '. opus'
ffmpeg -i inputAudio.m4a -c:a libopus -b:a 80k outputAudio.opus
Then use MKVToolNix to package the '. opus' file as mkv or mka
Finally, use LAV Splitter to decode this mkv, the bug will appear.
You will hear instantaneous noise occurring at some times.
the_opus_bug_with_lav.zip
2:36
5:12
7:47
10:24
13:00
......The volume of each noise is different.
Based on my tests, only LAV Splitter will cause this problem.
Original audio :
FFmpeg output file (audio.opus) :
The text was updated successfully, but these errors were encountered: