Extract audio channels ffmpeg -y -i input.mxf \ -filter_complex "asplit=2 pan=mono|c0=c0 pan=mono|c0=c1" \ -map channel_1.wav \ -map channel_2.wav We scale it to required dimensions and give a pattern for the thumbnail filename to be numbered as we like. The fps filter is used here to say that we need 1 frame every 5 seconds. Thumbnails at interval ffmpeg -y -i input.mp4 -filter_complex "fps=1/5,scale=320:180" thumbnail-%03d.jpg jpg extension, and -vframes 1 will tell FFmpeg to produce a single image at the specified time instance. Snapshot at time ffmpeg -y -i input.mkv -ss 2.598 -vframes 1 output.jpg Here, -ss and -to are used to specify the start and end times in seconds. Clipping ffmpeg -y -i input.mkv -ss 30.4 -to 40.15 output.mp4 Here we are using the scale filter and specifying the output width and height. Filters sit between the input and the output and make some change to the media flowing through them.
filter_complex can be used to combine many filters together. Resize the video ffmpeg -y -i input.mkv -filter_complex scale=720:480 output.mp4 map 0:v selects the video streams from the first input (we have only one input file here anyway, marked by 0), while 0:a means the audio streams. Take only video or audio ffmpeg -y -i input.mkv -map 0:v output.mp4 Here, we specify the video and audio codecs with -vcodec and -acodec. It is common to use FFmpeg to transcode from one codec to another. Codec conversion ffmpeg -y -i input.mkv -vcodec libx264 -acodec flac output.mkv In addition to these two, FFmpeg supports many other popular multimedia file formats, including MXF, AVI, WAV, M4A, JPG, PNG etc.
y denotes that we want to overwrite output.mp4 if it already exists. In this simplest example, FFmpeg produces MP4 output from MKV input. mpd files with mimetype="application/dash+xml", then you're all set.Format conversion ffmpeg -y -i input.mkv output.mp4 DASH works via HTTP, so as long as your HTTP server supports byte range requests, and it's set up to serve. Put the manifest and the associated video files on your web server or CDN. The -adaptation_sets argument assigns them into adaptation sets for example, this creates one set (0) that contains the streams 0, 1, 2 and 3 (the videos), and another set (1) that contains only stream 4, the audio stream.
The -map arguments correspond to the input files in the sequence they are given you should have one for each file. Ffmpeg \ -f webm_dash_manifest -i video_160x90_250k.webm \ -f webm_dash_manifest -i video_320x180_500k.webm \ -f webm_dash_manifest -i video_640x360_750k.webm \ -f webm_dash_manifest -i video_1280x720_1500k.webm \ -f webm_dash_manifest -i my_audio.webm \ -c copy \ -map 0 -map 1 -map 2 -map 3 -map 4 \ -f webm_dash_manifest \ -adaptation_sets "id=0,streams=0,1,2,3 id=1,streams=4" \
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