On Fri, Apr 17, 2020 at 17:02:21 -0500, First Last wrote: > I am uncertain whether this question is outside the scope of this forum, so > please advise me if it is.
It's a little bit off topic, but fine by me. This was handled here recently, and there's a lot of stuff on the web about it. Not detailed enough in my experience, so experimenting and asking here is the way to go. You'll find a few useful hints here: https://trac.ffmpeg.org/wiki/EncodingForStreamingSites > /home/ec2-user/ffmpeg-git-20200324-amd64-static/ffmpeg -re -loop 1 > -framerate 2 -i /home/ec2-user/testrun.jpg -s 1920x1080 -ab 128k -vcodec > libx264 -pix_fmt yuv420p -maxrate 2048k -bufsize 2048k -framerate 30 -g 2 > -strict experimental -f flv > rtmp://a.rtmp.youtube.com/live2/xxxx-xxxx-xxxx-xxxx > > It is a command I adapted from the edit on the response of the solution > found on: > > https://stackoverflow.com/questions/43586435/ffmpeg-to-youtube-live > > The only modifications I have made to the core command is removing the audio > stream, and changing the output resolution to match the optimal resolution > recommended for YouTube. It turns out exactly that is your big mistake. ;-) Try recommended command lines first, modify later (if possible): In my experience, an audio stream is a *must* for YouTube live streaming. You can help yourself with silent audio with minimal bandwidth. I believe I have succeeded with 8 and 16 kb/s AAC. (I used to believe it needs to be two-channel audio, but my notes say I succeeded with mono.) You can add silence by adding a second input: -f lavfi -i anullsrc and encoding it with low bandwidth AAC: -c:a aac -b:a 8k Other remarks regarding your command line: - You're using "-framerate" twice. Only one takes effect - the one before the input. The output option for framerate would be "-r". - That results in the output being 2 fps - YouTube won't accept that, IIUC. Always use 24, 25, 30 or 60 fps (or those divided by 1.001). - I don't see why you set the input image loop at 2 fps, only to (try to) expand it to 30 fps on the output. You may as well use "-framerate 30" as an input option (before the "-i") and drop the output option. - "-g 2" is a very low GOP size. (ffmpeg interprets this option as number of frames in a GOP, not GOP size in seconds.) YouTube recommends otherwise: GOP of 2, max 4 seconds. At 30 fps, that's "-g 60". > The resulting problem is that while ffmpeg appears to be successfully > streaming data, albeit with a few warnings I do not have an understanding > of, YouTube is not receiving data. Don't forget to check your YouTube live stream console. It gives some (hazy) indications about your stream's health. YouTube has some codec recommendations, but I believe you can deviate from them with little harm: https://support.google.com/youtube/answer/2853702?hl=en In other words: More experimenting. It gets more exciting, once you need to encode motion video in real time. ;-) Good luck, and tell us how it went, Moritz _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
