scaleResolutionDownBy should be able to scale down to close to any resolution you'd like. The only thing it cannot do is scale up.
If your goal is to put a cap on the bitrate for an encoding, setParameters can also set a `maxBitrate` constraint. We should support that too, but the implementation is fairly new and has seen lots of changes recently so there could be bugs. See this fiddle for an example: https://jsfiddle.net/pehrsons/7L9k7zLq/ Works for me in Nightly. On Tue, Aug 29, 2017 at 12:22 PM, <[email protected]> wrote: > On Monday, August 28, 2017 at 2:52:02 PM UTC+8, Andreas Pehrson wrote: > > Hi xpeng, > > > > You can use RtpSender.setParameters({ encodings: [{ > scaleResolutionDownBy: > > 2.0 }] }) to control resolution (bug 1244913 > > <https://bugzilla.mozilla.org/show_bug.cgi?id=1244913>). There's a > similar > > maxBitrate control as well. For framerate I'm not as sure what we > support. > > Others may comment later as they come online (US timezones). > > > > > > Andreas > > > > On Mon, Aug 28, 2017 at 5:41 AM, <[email protected]> wrote: > > > > > We found that the max-fr was disabled after firefox 53 , the max-fs was > > > also disabled after firefox 56 . How to control the resolution and > > > framerate now? > > > _______________________________________________ > > > dev-media mailing list > > > [email protected] > > > https://lists.mozilla.org/listinfo/dev-media > > > > Thanks , but the "scaleResolutionDownBy" can not solve our problem : > We want to get the 640*360 15fps video from camera by getusermedia,some > camera do not support resolution smaller than 1280*720, and just support > 30fps , we have to scale up framerate and scale down resolution to make > sure the total bitrate reaches our goal, so we finally getusermedia with a > parameter: 0-1920 0-1080 30fps to make sure succeed to getusermedia and > then use max-fs to scale down the resolution to 640*360/2 .but now the > max-fs do not work , the "scaleResolutionDownBy" also can not make sure the > resolution not smaller than 640*360/2 > _______________________________________________ > dev-media mailing list > [email protected] > https://lists.mozilla.org/listinfo/dev-media > _______________________________________________ dev-media mailing list [email protected] https://lists.mozilla.org/listinfo/dev-media
