bughelp wantedmodule: iomodule: video
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Description
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.