On 07.11.2017 15:29, Carl Eugen Hoyos wrote:
2017-11-07 8:40 GMT+01:00 Gyan Doshi <[email protected]>:
On 11/7/2017 11:03 AM, Constantine wrote:
Stream #0:0: Video: vp8 (VP80 / 0x30385056),
yuv420p(progressive),
480x640, 527 kb/s, SAR 1:1 DAR 3:4, 60 fps, 60 tbr, 60 tbn, 60 tbc
[vp8 @ 0x55c1ee9e05e0] Discarding interframe without a prior
keyframe!
VP8, like most delivery codecs, is an interframe codec. Supplying an
isolated frame will fail to decode, except perhaps for keyframes.
What you could try is to extract all frames and cat them together in
sequence to a single file. Then feed that to ffmpeg. Worth a try.
Doesn't work with VP* though;-(
Thanks, I confirm — it didn't work. That said, I have been thinking
whether it worth writing a script to extract the data, and in the end I
just cut the video through ffmpeg to a single frame. But with that frame
it didn't work.
Anyway, to be clear: VP* codecs aside, am I doing right in the first
mail? Mostly I mean the command line arguments to ffmpeg, though any
hints, of course, are welcome.
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