Is there a way to "explode" a video with multiple-audio tracks to multiple tracks in Reaper? Thanks.
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I haven't seen that option. Could you tell me where it is?
I just re-read what you put, from what I understand the explode action splits channels not tracks but I'll try it again and see if I did something wrong.
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Last edited by reddiesel41264; 07-09-2017 at 11:29 AM.
I just tried this and it only splits multi-channel audio, like stereo, into mono tracks. I need to extract multiple (2) audio tracks from my video into individual stereo tracks - or even if I could just select which audio track the video uses it would be a start.
__________________ http://librewave.com - Freedom respecting instruments and effects http://xtant-audio.com/ - Purveyor of fine sample libraries (and Kontakt scripting tutorials)
I just tried this and it only splits multi-channel audio, like stereo, into mono tracks. I need to extract multiple (2) audio tracks from my video into individual stereo tracks - or even if I could just select which audio track the video uses it would be a start.
Help us understand the difference between channels and tracks, please.
Help us understand the difference between channels and tracks, please.
Fran
Well channels are mono, stereo, 5.1 etc. Tracks are.. well tracks, like you might have a track in English, or German, or just a music track, and then a track with vocals. In my case I have some screen captured video with a narration track from a microphone and then an audio track from the software being screen captured.
__________________ http://librewave.com - Freedom respecting instruments and effects http://xtant-audio.com/ - Purveyor of fine sample libraries (and Kontakt scripting tutorials)
Well channels are mono, stereo, 5.1 etc. Tracks are.. well tracks, like you might have a track in English, or German, or just a music track, and then a track with vocals. In my case I have some screen captured video with a narration track from a microphone and then an audio track from the software being screen captured.
Are these "tracks" already mixed into a single track? If they have been mixed there's no unmixing, right?
The tracks are separate. I discovered I can open the video in Audacity and export each audio track as a separate wav, so this kind of solves my problem but I wonder why I can't do this as easily in Reaper.
__________________ http://librewave.com - Freedom respecting instruments and effects http://xtant-audio.com/ - Purveyor of fine sample libraries (and Kontakt scripting tutorials)
What was the result when you tried the Explode action in REAPER?
Fran
It just explodes the first audio track to two mono tracks, it ignores the second track entirely.
__________________ http://librewave.com - Freedom respecting instruments and effects http://xtant-audio.com/ - Purveyor of fine sample libraries (and Kontakt scripting tutorials)
David, when you look at the video track, what do you see? If the video has 2 stereo tracks, you see 4 separate channels?
It just shows 1 stereo track
__________________ http://librewave.com - Freedom respecting instruments and effects http://xtant-audio.com/ - Purveyor of fine sample libraries (and Kontakt scripting tutorials)
Aah, okay, that's good to know. I think for the most part it's very unusual for a video to have more than 2 channels, except a video with surround, and I've never had or worked with one of those, so I wouldn't know what to look for.
Good luck with it and hope you get it taken care of.
Aah, okay, that's good to know. I think for the most part it's very unusual for a video to have more than 2 channels, except a video with surround, and I've never had or worked with one of those, so I wouldn't know what to look for.
Good luck with it and hope you get it taken care of.
Not so unusual with screen captured software tutorials or multi-language videos
__________________ http://librewave.com - Freedom respecting instruments and effects http://xtant-audio.com/ - Purveyor of fine sample libraries (and Kontakt scripting tutorials)
Ah, multiple audio streams in one video file. Now we're talking.
Yeah, it's possible. In Reaper you can deal only with the first audio stream.
In my example I'll use TEncoder (free video/audio conversion software based on FFMPEG and MEncoder).
Be aware that you can do all this with the commandline version of FFMPEG as well. You simply need to know how, and there are likely places that can show you that. In fact, that'll be faster if you deal with a lot of this.
Toss your video file in to TENcoder. Click on the entry in the TENcoder window.
You'll get an audio track dropdown menu with whatever is inside the video file. Pick one. You can only pick one per entry in the file list, but you can add the same file multiple times.
To export just the audio, choose "None" in the Video Codec dropdown in the bottom left of the window. Then choose "Flac" or perhaos WAV. You need to test what works better for you.
Click on the "VIdeo and Audio options" button to set the sample rate and channel count of the resulting file. "Same as source" is the safe option.
That's it.
This is not the only program of course. Perhaps some folks can recommend others.
You can demux your audio tracks in to separate files as well, and then decode those to WAV with anything that can play them.
YAMB, a frontend for MP4box is a free frontend that lets you do this for MP4 files. The result would be MP4 files that are just audio, and thus AAC audio.
You can use those in the timeline of Reaper, or decode them to WAV,Flac or Wavpack with something like Foobar2000.
Ah, multiple audio streams in one video file. Now we're talking.
Yeah, it's possible. In Reaper you can deal only with the first audio stream.
In my example I'll use TEncoder (free video/audio conversion software based on FFMPEG and MEncoder).
Be aware that you can do all this with the commandline version of FFMPEG as well. You simply need to know how, and there are likely places that can show you that. In fact, that'll be faster if you deal with a lot of this.
Toss your video file in to TENcoder. Click on the entry in the TENcoder window.
You'll get an audio track dropdown menu with whatever is inside the video file. Pick one. You can only pick one per entry in the file list, but you can add the same file multiple times.
To export just the audio, choose "None" in the Video Codec dropdown in the bottom left of the window. Then choose "Flac" or perhaos WAV. You need to test what works better for you.
Click on the "VIdeo and Audio options" button to set the sample rate and channel count of the resulting file. "Same as source" is the safe option.
That's it.
This is not the only program of course. Perhaps some folks can recommend others.
Thanks I'll check out TEncoder!
__________________ http://librewave.com - Freedom respecting instruments and effects http://xtant-audio.com/ - Purveyor of fine sample libraries (and Kontakt scripting tutorials)
Yeah, it's possible. In Reaper you can deal only with the first audio stream.
not quite right
i suppose it depends on the codec
loading this https://archive.org/download/5.1Surr...AAC%20Test.mp4
into reaper will show all 65 audiotracks
and it can be exploded to 6 separate mono audiotracks in reaper
not quite right
i suppose it depends on the codec
loading this https://archive.org/download/5.1Surr...AAC%20Test.mp4
into reaper will show all 65 audiotracks
and it can be exploded to 6 separate mono audiotracks in reaper
win64
I hope that's a typo and you mean 6 audio tracks
Anyway those aren't tracks those are channels. Like I explained earlier channels are, for example, mono, stereo, 5.1. You could have 5 stereo tracks in a video + 5 mono tracks + 5 5.1 tracks. You would then select the audio stream you want to hear in your video player when you play it back. The most common experience people have with this is when choosing a different mix - so if you've only got stereo speakers you'd have the stereo track, if you have surround speakers you'd choose the 5.1 track, or when selecting a different language track, when you get a DVD you can usually select to play back in a number of languages, each one is a separate track (in the case of a DVD it's a bit different to having all of the tracks embedded in an MP4 file but the effect is the same, each track is separate and can have a different number of channels).
Another way of thinking about it is tracks in Reaper. Your Reaper project can have multiple tracks of audio, each one can have a different channel configuration, well the same is true of some video files.
__________________ http://librewave.com - Freedom respecting instruments and effects http://xtant-audio.com/ - Purveyor of fine sample libraries (and Kontakt scripting tutorials)
never read channel in thread title or first post ..
That's because this thread has nothing to do with channels, I'm interested in tracks
__________________ http://librewave.com - Freedom respecting instruments and effects http://xtant-audio.com/ - Purveyor of fine sample libraries (and Kontakt scripting tutorials)
Toss your video file in to TENcoder. Click on the entry in the TENcoder window.
You'll get an audio track dropdown menu with whatever is inside the video file. Pick one. You can only pick one per entry in the file list, but you can add the same file multiple times.
To export just the audio, choose "None" in the Video Codec dropdown in the bottom left of the window. Then choose "Flac" or perhaos WAV. You need to test what works better for you.
Thanks for this! I selected my second audio track and used "direct copy." It was done in a flash. Recording tutorial videos with multiple audio tracks will greatly speed up my workflow.
The ‘-c copy’ part is there so that we’re just taking the video out of one container (MKV) and putting it into another (MP4) without reecoding, which would be slow and lossy.
This time we’re not simply taking the audio out of one container and putting it into another; we’re actually reencoding to WAV. Typically the MKV included audio in AAC and we could use ‘-c copy’ to extract the AAC without reencoding, but I tried to work with AAC in REAPER and it didn’t go well, for example, I’d make edits and the audio would go out of sync. Reencoding isn’t as big a deal with audio as it is with video because it’s super-fast and we don’t lose quality, as we’re going from a more compressed stream (AAC) to a less compressed stream (WAV).
Programs such as OBS may record in stereo even if the source was mono, for example, a microphone. With the command above we’re extracting a single channel and creating a mono WAV. The ‘0.1’ corresponds to the stream (the thing that was ‘0:1’ in the examples above); the final ‘.0’ means channel 0 (that is the left channel in a stereo stream).
The example above is a single command that extracts all the relevant parts of a multitrack recording and produces files that are ready to edit in REAPER.
Different thread, same answer. Reaper cannot do this. You need a different tool. From the other thread I see you are on Windows so I suggest you start by looking at this. About as simple as it gets and can extract all streams at once.
The easiest way to do it if you’re recording in OBS is to just not record separate tracks to begin with. Record multichannel audio on one track instead. If your audio source is the ASIO plugin, it’s easy. If you use desktop audio and stuff it’s a little more complicated, needs some other software to do the channel routing. Once you get it recorded to multichannel, you can just open it in Reaper without any extracting necessary.
The easiest way to do it if you’re recording in OBS is to just not record separate tracks to begin with. Record multichannel audio on one track instead. If your audio source is the ASIO plugin, it’s easy. If you use desktop audio and stuff it’s a little more complicated, needs some other software to do the channel routing. Once you get it recorded to multichannel, you can just open it in Reaper without any extracting necessary.
WOW! Thanks so much, it's a good a idea! But I can't see in OBS multichannel option, but only tracks under Settings -> Recording
I started working on the ReaScript to explode multi-stream (multi-track) files, and I’m live-streaming the development process. Here’s the first session:
I expect to have this done by the end of the week.
Very cool, man! People need this. It is a lot easier to just record multiple streams in OBS than to do actual multichannel files when not all of the sources are ASIO.
Oh man thanks so much for this and for your effort doing your videos, they are really good. And really good for the reaper community !!! Very glad you are around!