[FFmpeg-user] ffplay with Havision Makito X video encoder, H.264 stream, and "intra refresh" option enabled

Kevin Hise hisekc at gmail.com
Thu Oct 29 07:49:59 EET 2020

Can I re-ask this question?

The Haivision (sorry...it's misspelled in the subject) Makito-X
encoder has a "intra refresh" setting that isn't supported by FFPLAY.
The Haivision hardware encoder takes SDI input and encodes it into
h.264 which is sent as transport stream over UDP. When you attempt to
display video with FFMPEG or FFPLAY, it eventually starts playing
video...I assume it waits for several minutes before a full key frame
is randomly sent and decoding can begin, but I'm not sure.

I'm wondering if there are any h.264 settings or other debug /
diagnostic info I can look into that might help me understand why. The
Haivision engineers may or may not be aware...since it decodes
correctly on their hardware it may not be their issue.

It was suggested here that I "attach a file" but I'm not sure how that
can be done with FFMPEG since it's unable to decode the video it
doesn't seem to write anything to a file when you try to record the

Would this question be a better one for the development mailing list, instead?

Thanks for any assistance.


On Tue, Oct 13, 2020 at 12:53 PM Kevin Hise <hisekc at gmail.com> wrote:
> "of the file generated" ....not sure what that means, still. FFMPEG
> doesn't create much of a file with "-vcodec copy" as an option when I
> try to record the TS stream to a file. 5 or 10 seconds...which should
> be 1 MB per second or so...is only about 750 KB. I've attached it
> here.
> On Sat, Oct 10, 2020 at 4:14 AM Reto Kromer <lists at reto.ch> wrote:
> >
> > Kevin Hise wrote:
> >
> > >Err...sample file of what?
> >
> > Of the file generated.
> >
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