ukmopa.blogg.se - Ffmpeg mp4 to m3u8

The output looks like: File "glocken.mp4" : Characteristics using Shaka Packager # packager input =glocken.mp4 -dump_stream_info However, both provide different output for the same media.

FFmpeg, ( on Stack Overflow) Display characteristics #īoth Shaka Packager and FFmpeg can be used to inspect the content of a media file and then display the characteristics of a stream.For this article, we often show these operations as separate commands for the sake of clarity.Ĭonversion is done with these applications:

For example, there's nothing preventing you from setting an output file's bitrate in the same operation as a file conversion. In many cases, the commands we're showing may be combined in a single command line operation, and would be when actually used. Although we've tried to show equivalent operations for all procedures, not all operations are possible in both applications. In this article we are going to learn some common commands for converting and manipulating specific characteristics of media files.

Remux (combine) the audio and video streams.

Demux (separate) the audio and video streams.

Changing this up to -crf 18 can result in a file size 2-5x smaller – but depending on content/viewing conditions may not be considered "visually lossless" (a subjective requirement – try different crf values with small samples beforehand by adding e.g.

-crf 10 value is low enough to look good (even with ultrafast preset), but will produce quite a large file.

-c:v libx264 – use libx264 encoder for video tracks.

-c:a copy will copy audio tracks instead of re-encoding.

The ultrafast preset option for x264 will make it go as fast as it can: ffmpeg -i INPUT -c:a copy -c:v libx264 -crf 10 -preset ultrafast -s 1280x720 -pix_fmt yuv420p -map 0 OUTPUT