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What is the recommended FFMPEG settings for encoding a video which can play on all apple devices, old and new. I would like the format to be in mp4 so that the video file is also compatible to android, windows (phone / pc) and linux. These are the current settings I have used and they do not work on iOS, These settings work great on Windows and Android but not on iOS. ffmpeg -i input_video.mp4 -c:v libx264 -crf 23 -profile:v baseline -level 3.0 -pix_fmt yuv420p -c:a aac -ac 2 -b:a 128k -movflags faststart -o output_video.mp4 I'm new to developing for iPhone/iOS. so thanks in advance.