[FFmpeg-user] ppsrc=1 decimation doesn't work or isn't correct or throws exception

[Mark Filipak (ffmpeg)]

I'm trying to file a bug report but there appears to be no way to get the report to you. I have some 
very short video samples and the ffmpeg report files. I spent 4 hours on this to make it so clear it 
will be very easy to replicate. But trac.ffmpeg.org won't accept it.

...Frustrated. Four hours. What a waste of my time.

On 12/21/2020 02:52 PM, Mark Filipak (ffmpeg) wrote:
> Win10-1803.
> 
> The sources & fault documentaion files are here: To be determined -- trac.ffmpeg.org rejects it, too 
> big (2,847,812 bytes) -- got any suggestions?
> 
> 
> RUNME.CMD : ffmpeg -i preprocessed.mkv -i source.mkv -filter_complex "decimate='ppsrc=1'" target.mkv -y
> 
> I ran RUNME.CMD 40 times.
> 
> 33 times, RUNME.CMD didn't do anything: target.mkv = 0 bytes.
> 
> 3 times, RUNME.CMD seemed to work but the decimation was wrong.
> source.mkv frames:           1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029
> target.mkv frames are:       1018      1020 1021 1022 1023 1024 1025      1027 1028 1029
> target.mkv frames should be: 1018      1020 1021 1022 1023      1025 1026 1027 1028
> 
> 'source.mkv frames 1018-1029.png' shows a source fragment that was made prior to frame number 
> insertion but including my structure notation.
> 
> 4 times, RUNME.CMD threw an "ffmpeg.exe - Application Error" exception:
> "The instruction at 0x00007FF6086540D9 referenced memory at 0xFFFFFFFFFFFFFFFF. The memory could not 
> be read."
> or
> "The instruction at 0x0000000000000000 referenced memory at 0x0000000000000000. The memory could not 
> be written."
> or
> "The exception unknown software exception (0x40000015) occurred in the application at location 
> 0x00007FF6083E2424."