We allow the viewers to select a low bandwidth or high bandwidth file and stream just the selected file. I am trying to move us to one player with that does adaptive bit rate switching. Of course I'd like the videos to be playable in the older iOS, androids as well as desktops with slow and fast connections.
The files currently stream have unaligned keyframes with the following bit rates and sizes. 738 kb/s 426x240 1340 kb/s 854x480 Can I add a few lower versions to the mix and a higher one? Can I realign the keyframes of the existing files? In my testing it seems to switch ok with these 2 files so far so I'm not so sure how crucial aligned key frames are. What have you seen out there? I see YouTube offers 6 and sometimes 7 different qualities for different connections. 1080p 720p 480p 360p 240p 144p What bitrates and dimensions do you think they're using? What do you recommend is good for adaptive bit rate switching? Someone was kind enough to help me out and get me started with this command. He said I didn't need to change the dimensions when making different bit rate versions. What's your opinion? At least not upscaling which makes sense. But if I want the videos to play on older phones should I make smaller dimensions? How do I change this command to make the different bitrate or sizes? ffmpeg [rawvideo demuxer options if required] -i input -c:v libx264 -crf 23 -preset medium -pix_fmt yuv420p -c:a libfdk_aac -vbr 5 -movflags +faststart output.mp4 Thanks for any help. _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
