Post processing mjr on separate server

[Anil Wadghule]

Hi,

Anyone using janus-pp-rec on AWS lambda or separate server to process mjr files to webm/mp4 and store to S3 etc?

Did you optimise this flow?

I am thinking of creating a live pipeline of converting .mjr files to mp4 and save it amazon s3. I will be using ffmpeg for conversion.

Do you know any faster way to do this? Can we directly send .mjr files to aws or any endpoint etc..

Thanks,
Anil

[Lorenzo Miniero]

Copying files is up to you. We provide an option to use a temporary extension until the file is ready, and only use .mjr when it's done, so you can have a script that monitors new .mjr files and moves them wherever they need to be.

L.

[Anil Wadghule]

Hi Lorenzo,

I am currently exactly doing the same.

The issue is that with ffmpeg, it takes like 5-10 seconds for converting .mjr audio video files to combined single .mp4 (for 1 minute video recording)

Can Janus's janus-pp-rec provide some option to write mjr's to mp4 relatively quickly? Else could you let me know script which is fast (copys codecs only .. and doesn't process)

Thanks,

Anil

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Best,

Anil

[sisnia...@gmail.com]

Hi Anil,

Can you please share with us your script?

I think 10 seconds is a long time for only 1 minute of recording.

A question for everyone:

Does anyone know if ffmpeg can mix two mp4 files into one? Imagine 2 peers in a videoroom and I want to have only one final video. Maybe I need other program?

Thanks!

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Best,

Anil

[Fabrizio Bertone]

Hi,

Yes, you can use ffmpeg to join multiple videos, here’s an example:

https://trac.ffmpeg.org/wiki/Create%20a%20mosaic%20out%20of%20several%20input%20videos

Fabrizio

[Anil Wadghule]

Hi 

You can find my script here

https://gist.github.com/anildigital/7adbdf46fc1750c777b9fa61a763ba58#file-mjr2webm-sh-L53

My major issue is this part

ffmpegParams="-strict -2"

command="ffmpeg -i $videoSource -i $audioSource $ffmpegParams $outputFile"

Anyone know if speed can be improved for above command.. I remember someone in IRC suggested to copy codecs instead actually do ffmpeg processing .. anyone know how to do this?

Thanks,

Anil

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Best,

Anil

[Alessandro Amirante]

2018-01-18 17:43 GMT+01:00 Anil Wadghule <anild...@gmail.com>:

Hi 

You can find my script here

https://gist.github.com/anildigital/7adbdf46fc1750c777b9fa61a763ba58#file-mjr2webm-sh-L53

My major issue is this part

ffmpegParams="-strict -2"

command="ffmpeg -i $videoSource -i $audioSource $ffmpegParams $outputFile"

Anyone know if speed can be improved for above command.. I remember someone in IRC suggested to copy codecs instead actually do ffmpeg processing .. anyone know how to do this?

Just add -codec copy to ffmpegParams, and it won't re-encode media.

A.

[Anil Wadghule]

There is an issue.. I am doing this

ffmpeg -i 4485.mp4 -i 4485.opus -strict -2 -acodec copy  output_yes.mp4

See opus and mp4 can't be mixed "[mp4 @ 0x170fb80] Could not find tag for codec opus in stream #1, codec not currently supported in container" error.

For now I am using

ffmpeg -i 4485.mp4 -i 4485.opus -c:v copy -c:a aac -b:a 128K output_yes.mp4

Do you know or anyone here.. better and fsater way to convert audio and video to single .mp4?

Thanks,

Anil

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Best,

Anil

[Alessandro Amirante]

You should be able to merge opus audio and h264 video into a .mkv container. Your command should look like this:

ffmpeg -i 4485.mp4 -i 4485.opus -c:v copy -c:a copy -b:a 128K output_yes.mkv

A.

[Anil Wadghule]

How is .mkv support to be played in browsers? ffmpeg IRC folks were not with .mkv for browsers.

I think I have to go with most common format used in web browsers..

Is it webm or mp4? or any other?

Thanks,

Anil

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Best,

Anil