the codec doesn't change resolution, the source does. so if you record a conference to send rtmp, change the conference canvas size. or you can try explicitly set the size e.g. record {vw=320,vh=240}rtmp://url... attach a log if it still not working.

On Thu, Jun 18, 2020 at 3:07 PM David P <davidswalkabout@gmail.com> wrote:
On both FSv1.8 and now on FSv1.10.3 (upgraded via packages), rtmp sent by our dialplan is always received in resolution 1280x720 even though we've tried several different ways of reducing it to 320x240.

Verto's logging of our gUM constraints verifies that our max resolution for video from the browser to FS is 640x480.

In av.conf.xml, we've tried uncommenting and editing this way:

    <profile name="H264">
        <param name="profile" value="baseline"/>
        <param name="level" value="2"/>

FS logging confirms that the bug is using the H264 codec.

Is there anything else to try?

Cheers,
David
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