[Live-devel] H.264 in MPEG-2 TS streams roughly at the start

[Warren Young]

On 9/10/2012 5:51 PM, Warren Young wrote:
>
> If you take
> a guess at the GOP length, you can infer frame rate.

I meant bit rate, obviously.

We've tried to get a CBR stream out of ffmpeg, just to prove to 
ourselves that stream variability is the problem.  We haven't succeeded. 
  Apparently ffmpeg is incapable of CBR with H.264, even when you set 
min = avg = max.

That said, those settings did greatly reduce the variability.  Here's 
the new stream:

     http://etr-usa.com/live555/h264-test-cbr.ts

It shows the same stuttery playback with the stock build of the RTSP 
server.  The bit rate range is now 5-10 Mbit/s over the majority of the 
play time, averaging 7.5 Mbit/s.  (It was 2-16 Mbit/s!)

We'll try to get a less variable file out of other encoders next.