Dump h264/h265 stream

[Anton Pryima]

Hello all.

I have rtsp camera which streams h264 to the appsink. Then, sometimes, I
need to grab it by appsrc and write it to the file.
I was able to make it with the following pipelines:
rtspsrc->rtph264depay->appsink
appsrc->h264parse->matroskamux->filesink.

Everything works as expected. But, as in h264 stream, I-frames can be
transmitted once per 20 - 30 seconds, sometimes I've got 10 seconds of
corrupted video before the fist I-frame and good video starts.
Is there are any way, to ignore everything before first I-frame or start
file form first i-frame? I've tried with splitmuxsink and tried to google,
but with no success.

Any suggestions?

Thank you in advance,
Best regards,
Anton.
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