CODEWITHSUNDEEP
audiovideoencodingffmpeg
Max N.
Max N.

Reputation: 1145

Re-encode video stream only with ffmpeg (and with all audio streams)

I'm looking for a way to re-encode the video stream of a movie only and keep all other streams as they are using ffmpeg or more specific streamio/streamio-ffmpeg (Github - StreamIO-FFMPEG).

I already tried various combinations of -map 0 or -map a:0 -map s:0, but in all combinations I tried, either nothing is encoded at all, or not all other streams are copied to the new file. In most cases there is only one audio stream after encoding, when there were two before, and sometimes the subtitle streams are lost, too. Also most times the info what language the streams are in gets lost.

So when I have a movie file (mkv) with the following streams:

0: video [H.264, 1080p]
1: audio [english, mp3]
2: audio [french, mp3]
3: subtitle [english (forced)]
4: subtitle [english]

What should the ffmpeg parameters be, if I want to encode the video file to H.265 and 720p and keep all other streams as they are?

What should the parameters be, if I additionally want to encode the audio streams as AAC?

Thanks in advance!

Upvotes: 0

Views: 11632

Answers (1)

Gyan
Gyan

Reputation: 93329

Use

ffmpeg -i in.mkv -vf scale=hd720 -map 0 -c copy -c:v libx265 out.mkv

To encode audio as well,

ffmpeg -i in.mkv -vf scale=hd720 -map 0 -c copy -c:v libx265 -c:a aac out.mkv

(The order of the arguments above matter)

Upvotes: 6

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