Multiple Captures on Single Interface about bmdtools

[msslava]

PreDeToR, I also wanted to realize this. Have you found a solution?

[PreDeToR]

Hi @msslava

Yes I found a bit of a work-around, not the prettiest of solutions but it works.

What I Did was
1)Capture the stream and stream it to a file using mpegts (This allows reading and timestamping of the file while its being written to), This file/process is reset once a day.
2)I then have a script that gets the duration of the above file and starts as new ffmpeg process to stream using the timestamp so that I am always starting at the end of the file, I have two of these processes as I needed to stream to two different locations and pull the audio out the source stream differently as the one channel as english and the other french.

This works perfectly fine, it just uses some extra cpu.

[msslava]

Hi, PreDeToR! Thanks for you reply.
An interesting idea with a temporary file. I want to record video from SDI and for me the main quality video. The mpegts can not this. How to be in this case?
Can you share your scripts for reference?, for me it would be very useful. Thank you!

[PreDeToR]

@msslava

you can adjust the quality, my feeds aren't hd so its easy:

1. /root/bmdtools/bmdcapture -C 5 -m 1 -A 2 -V 4 -M 2 -F nut -d 1 -v -f pipe:1 | ffmpeg -loglevel error -i pipe:0 -y -c:a mp3 -strict -2 -ac 2 -ar 44100 -ab 128k -deinterlace -pix_fmt yuv420p -vcodec libx264 -preset slow -coder 1 -bf 3 -x264opts nal-hrd=none -g 25 -b:v 3500k -bufsize 8500k -f mpegts "/root/Streams/5.mp4"

The above script restarts once a day, and streams to the single file all day, so you just need to know how long the stream is , using ffprobe, to make sure you set the start time for your 2nd process

2. ffmpeg -loglevel info -re -ss 57 -t 43200 -i "/root/Streams/5.mp4" -map_channel 0.1.1 -c:a mp3 -strict -2 -ac 2 -ar 44100 -ab 128k -af "volume=4" -pix_fmt yuv420p -vcodec libx264 -preset slow -coder 1 -bf 3 -x264opts nal-hrd=none -g 50 -b:v 3500k -bufsize 5500k -f flv 'rtmp://xxx/xxx'

[msslava]

I mean, when we 1) write to mp4 and then 2) want to get from it in ProRes (for example) - it's wrong, I think.
Thank you for sharing

[PreDeToR]

Ah, not sure about that i know ffmpeg can handle it for me, you might need something like a rtmp stream that you need to send to