On 2021-02-21 21:39, pdr0 wrote:
Mark Filipak (ffmpeg) wrote
I've run some test cases for the shuffleframes filter. I've documented
shuffleframes via my
preferred documentation format (below). In the course of my testing, I
found 2 cases (marked "*****
Expected", below) that produced unexpected results, to wit: If the 1st
frame is discarded, the
entire input is discarded, even if the 1st discard is followed by frames
that are supposed to be
retained.
-1 1 ...Blocks the pipeline (discards all frames). *****
Expected 1 3 5 7 ..
-1 1 2 ...Blocks the pipeline (discards all frames).
***** Expected 1 2 4 5 7 8 ..
These 2 cases produce the expected result for me
If the "entire input is discarded" - do you mean you get no output file at
all ?
No output file at all. The transcodes complete (they don't hang awaiting end-of-stream) but since
the pipeline contains no frames, the encoder makes nothing and ffmpeg makes no files.
Post more info, including the console log
First, for context, the scripts:
ffmpeg -i 0.mkv -vf shuffleframes="-1" -dn "\-1.mkv"
ffmpeg -i 0.mkv -vf shuffleframes="-1 1" -dn "\-1 1.mkv"
ffmpeg -i 0.mkv -vf shuffleframes="-1 1 2" -dn "\-1 1 2.mkv"
I had to escape the '-' in the filenames in order to avoid this complaint:
"Unrecognized option '1 1 2.mkv'.
"Error splitting the argument list: Option not found"
Perhaps it would be expeditious if you showed me your command line that works,
eh?
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