[FFmpeg-user] balancing image generator and FFMPEG 'loop'

[Henk D. Schoneveld]

On 08 Dec 2013, at 11:38, bino at indoakses-online.com wrote:

> Dear All ...
> 
> I'm trying to get a cam snapshots and stream it out to ustream
> 
> my solution is based on two things
> 1. Snapshot downloader :
> It's based on
> https://github.com/jpmeijers/pisstvbeacon/blob/master/AircamDownload.py ,
> and I make it to send request in loop.
> Currently with this script, new image will be generated each second
> (more/less).
You do generate 1 frame every second. So framerate is 1 or in ffmpeg terms “-r 1”
Hope you now understand how to balance or NOT get rushing.
> 
> Each image have a sequence number in it's name : pic01.jpg --> pic99.jpg
> 
> 2. Streamer :
> 
> ffmpeg -re -loop 1 -f image2 \
>    -i "/var/run/snapshots/inaxtower/pic%02d.jpg" \
>    -r 10 -vcodec libx264 -pix_fmt yuv420p \
>    -f flv "rtmp://1.XXX.fme.ustream.tv/ustreamVideo/XXX/USTREAM_KEY
> flashver=FMLE/2.50(compatible;0FMSc/1.0)"
> 
> 
> Currently the result looks like 'rushing'.
> 
> You can check my current result at : http://www.ustream.tv/channel/16636088
> Please put attention on the clock stamp at top-left of the movie, looked
> weird.
> 
> My Question is :
>    How to balance image generation rate (script #1) with the ffmpeg rate ?
>    I mean, what number should I put for image generation rate? ,and
>    what number should I put for the value of ffmpeg '-r' ?
> 
> Sincerely
> -bino-
> 
> 
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