Marth64 changed the topic of #ffmpeg to: Welcome to the FFmpeg USER support channel | Development channel: #ffmpeg-devel | Bug reports: https://ffmpeg.org/bugreports.html | Wiki: https://trac.ffmpeg.org/ | This channel is publically logged | FFmpeg 7.1 is released
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<Laridaeus>
Hello experts! I'm wondering if anyone could help me getting ffmpeg to cache an incoming video stream for stutter free playback, I've tried various hints I've seen with -rtbufsize -f fifo -queue_size ... but nothing seems to make a difference
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<Laridaeus>
Ok, seems like -thread_queue_size in output can do the trick?
<BtbN>
That option is completely unrelated to any buffering
<BtbN>
ffmpeg generally will just do stuff as fast as it can, so I'm not quite sure what you're askin
<BtbN>
the moment new data comes in, it'll go through all processing asap
<BtbN>
buffering for smooth playback is a player thing to implement
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<Laridaeus>
I'm using ffmpeg over a somewhat unstable and sometimes congested VSAT link, latency ~700 ms, ffmpeg is streaming the input HLS stream to TVheadend which distributes the stream to multiple clients, but as the link is unreliable I want it to buffer more than the default 3 chunks when it can aquire data... so I want ffmpeg to read ahead as fast as it can and as much as it can, but stream it to tvheadend in realtime so clients don't experien
<Laridaeus>
ce stuttering
<Laridaeus>
stream in realtime from the buffer I mean
<BtbN>
I don't think that's something ffmpeg can do
<BtbN>
It's very against its usual mode of operation
<BtbN>
You could try opening the input in -re mode, but that could also go horribly wrong
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<Laridaeus>
Using the -thread_queue_size in output does seem to work, I guess that queue size acts as a buffer which is emptied in realtime even if it can be filled faster than realtime, I'll be doing some further experiments, thanks for the help :-)
<BtbN>
"For output, this option specified the maximum number of packets that may be queued to each muxing thread." this sounds more like it'll randomly start discarding stuff if the output somehow can't keep up