[FFmpeg-user] Low latency H.264 streaming with ffmpeg
ken.fields at gmail.com
Wed Jan 13 01:02:48 CET 2016
yes, we’re having the same issue now.
but -benchmark also really degrades the stream.
Is there any options possible for -benchmark (moderate, strict)?
> mplayer -benchmark has been the only client I've found with reasonable
> latency, though I'm sure there are others/more.
> I've gotten pretty low latency before with ultrafast+zerolatency
> Basically my advice is "be wary of ffplay (and vlc)" I'm not sure if
> its latency is low enough...
> On Jan 13, 2016, at 2:30 AM, Roger Pack <rogerdpack2 at gmail.com> wrote:
> On 1/12/16, Greger Burman <gb at moroco.se <mailto:gb at moroco.se>> wrote:
>> I would like to hear from anyone who has experience with low latency video
>> streaming and ffmpeg.
>> In my application I take video from a PCIe capture device and stream live
>> over network. The end to end latency must be below 200ms otherwise it is
>> not usable. Let us assume that the network latency is near zero. This
>> question is about encoder+decoder+buffering latency.
>> Very low latency can be achieved when using the x264 encoder by using
>> settings like tune zerolatency. From my own testing with x264 (without
>> ffmpeg) I can confirm that this works. I have measured approx 90 ms (3
>> frames) of latency added by encoder+decoder combined. Awesome.
>> Sadly I have been unable to get anywhere near those numbers when using
>> ffmpeg and libx264. As player I use either ffplay or a dot-net player built
>> on the ffmpeg libraries, with about equal results. The lowest end to end
>> latency I have seen is 400-500ms. That includes capture latency also.
> https://trac.ffmpeg.org/wiki/StreamingGuide <https://trac.ffmpeg.org/wiki/StreamingGuide>
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