[FFmpeg-user] filter_complex for multiple rtmp stream

Jesse Liu jesselfree at gmail.com
Mon Oct 23 10:13:26 EEST 2017

you should use api do it yourself, the ffmpeg command  line tool doesn’t support what you want.

> On 22 Oct 2017, at 8:44 AM, kamal shadi <kamal.shadi85 at gmail.com> wrote:
> Hi all,
> I am trying to apply a filter_complex operation on multiple rtmp streams.
> Here is my sample run of ffmpeg to do so:
> *ffmpeg -i rtmp://localhost/live1/stream1 -i rtmp://localhost/live1/stream2
> -filter_complex "[1][2]overlay=x=160:y=0" -c:v libx264 -preset veryfast
> -b:v 2000k -bufsize 4000k -c:a copy -r 30 out.mov;*
> I want the stream1 to render into output no matter if the stream2 is
> available or not. but the above command waits for both streams to be
> available. When stream2 is not connected I get following error:
> *RTMP_ReadPacket, failed to read RTMP packet
> headerrtmp://localhost/live1/stream2: Invalid data found when processing
> input*
> How can I use a placeholder for stream2? Something like A nullsrc filter
> that kicks in whenever stream2 is not available?
> Thanks in advance,
> Kamal
> P.S: In case it matters, the above commands are run on nginx rtmp module
> for the server.
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