Trimming mp4 video
pascal at fluffyspider.com
Tue Feb 18 02:12:20 UTC 2020
I am trying to trim a mp4 video file, but having some issues with
something that simple.
I am running the following pipeline:
filesrc ! qtdemux ! h264parse ! mp4mux ! filesink
At this stage, it creates an exact clone of the original video
Then I figured out I should do the following:
- Start the pipeline in PAUSED state
- Issue a SEEK with FLUSH and KEY_UNIT flags
- Put the pipeline to PLAYING state
- Wait for the EOS message
This does not work. The created file seems to be the right size but it
does not play.
After few experiments, I can create the trimmed video but only when I
start the whole pipeline in PLAYING state. Then the file is valid but I
can see the very first few frames of the original video before the
My sample code is in here: https://trinket.io/python/185bdb1678
I might be missing something obvious?
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