[FFmpeg-user] (no subject)

[owen s]

I think it's the encoding speed that's causing the problem.

Typically, encoding faster than real time would be a good problem to have
but in this situation, when I stream this fast, it fills up the streaming
platform buffer
after some point the streaming platform gets too far behind and cuts the
stream.

This is why I would like to limit the speed to something closer to 1x.

On Tue, Jan 26, 2021 at 9:48 AM Mark Filipak (ffmpeg) <markfilipak at bog.us>
wrote:

> On 01/25/2021 07:09 PM, owen s wrote:
> > I am running this command
> >
> > ffmpeg-git -y \
> > -vaapi_device /dev/dri/renderD128 \
> > -framerate 60 -i ./image.jpg \
> > -stream_loop -1 -i ./audio.mp3 \
> > -map 0:v \
> > -c:v h264_vaapi \
> > -vf
> >
> 'crop=2560:1440:0:0,format=nv12|vaapi,hwupload,loop=loop=-1:size=1:start=0,hwdownload,format=yuv420p'
> > \
> > -rc_mode 2 -b:v 20M \
> > -c:v libx264 \
> > -map 1:a \
> > -c:a libfdk_aac -b:a 128k -ar 44100 -ac 2 \
> > -af "dynaudnorm=f=150:g=15" \
> > -f flv /dev/null
> >
> > the encoding speed is very fast, typically 1.78x
> >
> > frame=2512127 fps=107 q=0.0 size=56457493kB time=11:37:47.36
> > bitrate=11046.8kbits/s speed=1.79x
> >
> > Is there any way to limit this speed to a standard 1x?
>
> With no guide to report formats you are understandably misinterpreting
> what ffmpeg is trying to tell
> you.
> The "speed=1.79x" means that the encoder time was 1.79x the running time.
> In other words, it took
> less time to encode than to play the video. To see the video's playback
> speed, look for lines that
> look like this:
> Output #0, matroska, to ...:
>    Metadata:
>      encoder         : Lavf58.65.100
>      Stream #0:0, 0, 1/1000: Video: hevc, yuv420p(tv, progressive),
> 720x240 [SAR 8:9 DAR 8:3],
> q=2-31, 59.94 fps, 1k tbn
>
>
> --
> Someone's sneaking in and turning up the range so that my food burns.
> I'm sure of it.
> And the older I get, the more sure of it I become.
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
> To unsubscribe, visit link above, or email
> ffmpeg-user-request at ffmpeg.org with subject "unsubscribe".