If it is not possible with the format, ffmpeg should then error out. You can use -map 0 to ensure that all streams are copied.
#Ffmpeg copy subtitles streams how to
How to use the -map option to choose streams.This example will overlay the fourth subtitle stream over the second video stream, and stream copy the seventh audio stream: ffmpeg -i input.mkv -filter_complex "overlay" -map "" -map 0:a:6 -c:a copy output.mp4 Note that this requires re-encoding, so it will by much slower than using softsubs.īasic example using default stream selection behavior while stream copying the audio: ffmpeg -i input.mkv -filter_complex "subtitles=input.mkv" -c:a copy output.mp4Įxample to use the third video stream, fifth subtitle stream, and first audio stream: ffmpeg -i input.mkv -filter_complex "subtitles=input.mkv:si=4" -map "" -map 0:a:0 -c:a copy output.mp4Įxample for a separate subtitle input file ( your-subtitles-file.srt): ffmpeg -i input.mp4 -filter_complex "subtitles=your-subtitles-file.srt" -c:a copy output.mp4 Use the subtitles filter to "burn-in" text based subtitle formats (SRT, ASS, VTT, etc). Hardsubs Text based subtitle format inputs Same as above but use the -map option to choose the first video stream, second audio stream, and third subtitle stream: ffmpeg -i input.mkv -map 0:v:0 -map 0:a:1 -map 0:s:2 -c:v libx264 -c:a aac -c:s mov_text -metadata:s:s:0 language=eng output.mp4
#Ffmpeg copy subtitles streams mp4
Same as above but re-encode the video and audio to formats compatible with the MP4 container (H.264 video: ffmpeg -i input.mkv -map 0 -c:v libx264 -c:a aac -c:s mov_text -metadata:s:s:0 language=eng -metadata:s:s:1 language=ipk output.mp4 ffmpeg -i input.mkv -map 0 -c copy -c:s mov_text -metadata:s:s:0 language=eng -metadata:s:s:1 language=ipk output.mp4 MP4 supports streaming text format subtitles, but playback support for this among players and devices is not universal.īasic example using default stream selection behavior while stream copying the audio: ffmpeg -i input.mkv -c copy -c:s mov_text output.mp4Įxample to stream copy all of the video and audio streams, convert the all text based subtitle input streams (SRT, ASS, VTT, etc) to the streaming text format, and set the language for the first two subtitle streams.
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