badrise.blogg.se - Ffmpeg gui player

The second command to repackage the workstream is: MP4Box -dash 10000 -frag 500 -rap -single-file -segment-name segment_base_name_ -tfdt $TFDT_OFFSET /tmp/output_segment.mp4 -out /tmp/unused_ouput.mp4

"-c copy" copies the original stream and would be replaced by something like "-g 30 -c:v libx264 -crf 22 -profile:v high -level 3.1" if it had to be transcoded. "-copyts" keeps the timestamps as they are, so the extracted segmented would start at 30s, not 0. "-t 11" keeps 11 seconds of the track after that (the overlap avoids gaps in the playback). "-ss 30" tells ffmpeg to start 30 seconds after the start of the file. The command for step 1 would look like this (for the 3rd segment of stream 0): ffmpeg -y -ss 30 -t 11 -threads 8 -copyts -start_at_zero -i "/path/to/original.mp4" -map 0:1 -c copy /tmp/output_segment.mp4

Repackaging it using MP4Box for MSE to consume it on the client side.

Convert a 10-second section of one stream of the original file using ffmpeg (or extracting it if it was in x264 already).

To summarize, the idea was to provide a dash manifest to the client, but only convert the segments when the client was asking for them.

I know it's an relatively old question, but I think I managed to implement the solution you're describing. So treating it as a live stream isn't an option. The client-side player should be able to buffer the next X segments, and the user should be able to view the current position on the duration bar and seek to a different position. My current ffmpeg command looks like this (after lots of trying): ffmpeg -ss 10 -t 5 -i video.mkv -f mp4 -c:a aac -c:v h264 -copyts -movflags empty_moov+frag_keyframe temp/segment.mp4 So transcoding (with ffmpeg or similar tool) is required.

The input video file can be any format, so it cannot be assumed it's in an mp4/dash-compatible codec. So how do I adjust my ffmpeg command to transcode just the part I need as a Dash segment, without having to generate the segments for the entire video file in advance? Ffmpeg lets me set -ss and -t to define the boundaries of the segment I need, but they don't play properly in the player because they're "full" video files rather than Dash segments. I was able to implement the client side player with the dash.js reference implementation, so it will dynamically request segments from the server (using SegmentTemplate in the mpd file).īut I'm having some problems generating these chunks in real-time. I've been trying to implement a Plex-like video player that transcodes an arbitrary video file on-demand, and plays it with MPEG-Dash on a webpage.