hello all,
using ffmpeg i want to live transcode an input live stream into multiple
variants and push all of them (including the original) to the client.
everything works all right except for one thing: i want all keyframes to
be properly aligned between streams but it seems that over time, they
get misaligned which is probably as expected because it would make sense
for ffmpeg to treat each output and do its keyframe generation quite
independently. however, the first question:
1. how can i enforce keyframe alignment between output transcoded
(reencoded) streams in ffmpeg? i don't need P/B or other frame types to
be aligned, but I-frames should be exactly on the same frame numbers on
all streams
to extend this even further:
2. how can i enforce keyframe alignment also with input which i would
like to simply -c copy ? this means that reencoded outputs should have
the exactly same keyframe placements as the input, thus, internal codec
heuristics should be disabled on this matter.
i am talking about a h264/x264 input/output.
thanks much.
--
Claudiu
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