scheutzo <[email protected]> added the comment:

Analysis of this bitstream by non-ffmpeg tools shows that it contains a
substantial number of bitstream errors: about 2% of the transport stream packets
are marked as "errored", and an additional 1% are simply missing.

These errors were likely caused by a very weak satellite signal, or defective
electronics, and the demodulator could not stay locked.

In the original, no-error bitstream, every video frame appears to have had a
DTS/PTS timestamp.

So the complaint - non-monotone timestamps - is a side effect of the ffmpeg
transport stream demuxer trying, but failing, to extract video data from an
input stream with severe packet errors.

A general fix for this situation probably not possible, although this sample is
an interesting for checking error-robusteness.

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nosy: +scheutzo

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