This is a CBR setting, of course, and might result in lower visual quality per file size.Īdd the -q:a option for VBR MP3, with values between 0 and 7, 0 being the best quality.Īdd the -b:a option for CBR MP3, e.g. This is a VBR setting.Īdd the -b:v option with a bitrate, e.g. If you need to change the video quality, you have two options:Īdd the -qscale:v option after -i in.mp4 with a value from 1 to 31, where higher means lower quality (try with 2 or 3 first). This will default to converting the video to Sorenson Spark (H.263, or known as flv1) and the audio to MP3, using whatever MP3 encoder your FFmpeg has-probably libmp3lame. Basically, like this: ffmpeg -i in.mp4 out.swf
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