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

[Mojtaba Nouri]

Hi
We had the same problem, and we solved it by creating cbr ts files stuffed
with NULL packets.
The following thread shows the ffmpeg command parameters to create h.264
cbr files:
http://stackoverflow.com/questions/7125446/encoding-h-264-cbr-videos-with-ffmpeg


Mojtaba Nouri
Soroush HighTech Ltd.

On Tue, Sep 11, 2012 at 9:41 PM, Warren Young <warren at etr-usa.com> wrote:

> 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<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.
>
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