[fyi][video] Video clip creation fails on YFCC

Culprit:

known bug in H264 decoding

For certain filetypes - specifically some related to YFCC100m dataset - there is an error whilst creating the VideoClips object. Not 100% sure what is the best way of fixing the issue (other than try-catch in read_video_timestamps.

Even if the fix is not critical, we should make sure that is caught in C++ or future versions.

Sample YFCC video in question:

27b66931edb88a5f7e6c756ea65fd8.mp4
there are at least 50 of them, probably more.

Minimal repro example

video_list = ['~/yfcc100m/mp4/27b/669/27b66931edb88a5f7e6c756ea65fd8.mp4']
VideoClips(video_list, 8, 1)

or even simpler

import av
container = av.open('~/yfcc100m/mp4/27b/669/27b66931edb88a5f7e6c756ea65fd8.mp4')
for idx, frame in enumerate(container.decode({'video': 0})):
    pass

Output error stack:

Invalid NAL unit size (34173 > 22144).
Error splitting the input into NAL units.
stream 1, offset 0x16baf66: partial file
Invalid NAL unit size (24747 > 6180).
Error splitting the input into NAL units.

Start with the VideoClips construction path and read_video_timestamps, then reproduce the failure using 27b66931edb88a5f7e6c756ea65fd8.mp4 and the av.open decoding example from the issue. Determine how the H264 decoding error should be handled, and verify that creating VideoClips no longer fails unexpectedly for the affected YFCC files.