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ffmpeg add two audio streams to video - Super User
https://superuser.com/questions/508331/ffmpeg-add-two-audio-streams-to-video
ffmpeg -i input_with_first_audio_stream.avi -i second.mp3 -acodec copy -vcodec copy output_two_audio_streams.avi -newaudio works with both versions of ffmpeg that I use, but the first audio stream is played too fast (x10 or more), while the …
FFMPEG convert video with multiple audio streams?
https://video.stackexchange.com/questions/12051/ffmpeg-convert-video-with-multiple-audio-streams
-c:a -> select best supported audio (transcoded) -c:a copy -> best supported audio (copied) -map 0:a -> all audio from 1st input file (transcoded) -map 0:0 -> 1st stream from 1st input file (transcoded) -map 1:a:0 -> 1st audio stream from 2nd input file (transcoded) -map 1:a:1 -c:a copy -> 2nd audio stream from 2nd input file (copied)
ffmpeg Merge two Audio Streams into one · GitHub
https://gist.github.com/LukasKnuth/4d7ee6812ccb221b2775e984516b56d4
ffmpeg Merge two Audio Streams into one Raw Readme.md This script takes a single input file and Reduces the volume of the third audio-track in the file by half Writes the reduced volume track into l Mixes both the second audio-track and the lowered l -track together and stores them into a Maps the original video to be the first track
Ffmpeg to duplicate an audio stream and encode this …
https://stackoverflow.com/questions/21567029/ffmpeg-to-duplicate-an-audio-stream-and-encode-this-new-stream
This command will take a video with 1 audio stream, and downmix to stereo and convert the audio stream and add it as a 2nd audio stream. It will be in AAC 384k. ffmpeg -i INPUT.mkv -strict -2 -map 0 -c copy -map 0:a:0 -c:a:1 aac -b:a 384k -ac 2 OUTPUT.mkv. Explanation of the command. ffmpeg -i INPUT.mkv The application and input file-strict -2 …
ffmpeg Documentation
https://ffmpeg.org/ffmpeg.html
For example, if you need to merge a media (here input.mkv) with 2 mono audio streams into one single stereo channel audio stream (and keep the video stream), you can use the following command: ffmpeg -i input.mkv -filter_complex "[0:1] [0:2] amerge" -c:a pcm_s16le -c:v copy output.mkv
FFmpeg: rearrange audio streams in video files - BlogX
https://blogx.ch/blog/technology/ffmpeg-rearrange-audio-streams-in-video-files-950/
Stream 1: audio stream, English language, default stream. Stream 2: audio stream, German language. no forced language stream. To do that we can use the following command: FFmpeg command. ffmpeg -i input.mkv -c copy -map 0:m:language:eng -map 0:m:language:ger -disposition:a:0 default -disposition:a:1 0 output.mkv alternative command ffmpeg -i ...
2 Audio streams in 1 OGG : ffmpeg
https://www.reddit.com/r/ffmpeg/comments/cdhb0d/2_audio_streams_in_1_ogg/
2 Audio streams in 1 OGG. Hello, i want to extract 2 audio streams from two audio files to an .ogg output (no video). Is the following going to work?: ffmpeg -i input1.mp3 -i input2.mp3 -c copy -map 1:a:0 -shortest output.ogg.
How to extract specific audio track (track 2 ... - Ask Ubuntu
https://askubuntu.com/questions/1139812/how-to-extract-specific-audio-track-track-2-from-mp4-file-using-ffmpeg
You can use the -map option to choose specific streams. To get a list of the available streams, run ffmpeg -i INPUT_FILE.EXT (Do not forget -i!), which gives e.g.: … Input #0, EXT, from 'INPUT_FILE.EXT': Metadata: encoder : VirtualDubMod 1.5.10.2 (build 2542/release) Duration: 01:35:35.88, start: 0.000000, bitrate: 1029 kb/s Stream #0:0: Video: mpeg4 …
Creating multiple outputs – FFmpeg
https://trac.ffmpeg.org/wiki/Creating%20multiple%20outputs
ffmpeg -i input.file -c:v libx264 -c:a mp2 \ -f tee -map 0:v -map 0:a "output.mkv|[f=mpegts]udp://10.0.1.255:1234/" If you want to choose specific streams then use the select option. In this next example the video stream is split and scaled to two different sized outputs, and the audio is encoded only once but used by both outputs.
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