Keep preferred Audio Track

thepix

Hi,
Is there an easier method to just keep your preferred audio track? Usually I may have 5.1 and 2.0 tracks, with the 2.0 being the first track. Out of the 2 though, my preferred would be the 5.1 version.

Currently I only seem to be able to removal all and the convert to a codec and stream choice. But if there is a 2.0 it will try to upmix it, which I don't want I'd rather just keep as source. If there is a 5.1 and 2.0 640kbps or less I would like to keep the 5.1 same as source and if there is a 5.1 over 640kbps, only then I'd like to convert it down to 640kbps.

I've no experience writing code and don't know the language to write a script or function, so any support would be much appreciated.

thepix

Anybody help?

reven

easiest would be to write a function to loop through the tracks and remove those you dont want.

thepix

Not exactly familiar with the coding language, but I think I may have cobbled something together.

I copied one of the scripts in the repository "Video - Resolution" and amended to the following:

/** *@output Convert to 640kbps *@output Keep Audio as Source */ function Script() { // from the first audio stream let audio = Variables.vi?.VideoInfo?.AudioStreams[0]; if(!audio) return -1; // no audio streams detected if(audio.Bitrate > 645) return 1; // TrueHD DTS | Convert to 640kbps if(audio.Bitrate === 640) return 2; // Prefered Bitrate | Keep As Source if(audio.Bitrate < 640) return 2; // Acceptable Bitrate | Keep As Source }

I reorder the Audio by EAC3, AC3 and AAC and then by 5.1 and 2, remove all but 1 stream, use the script which should just convert if above 645 kbps, otherwise passes through to Subtitle Remover.

It seems to be working from the tests I tried, wasn't sure if the audio.Bitrate commands were correct qnd I'm sure there's an equal to or less than syntax I'm missing??

thepix

thepix This script actually isn't working, constantly producing a "1" output, so help would be appreciated.

reven

You're doing a check of 645. That's likely only 645Bps not KBps. Log the bitrate to see the actual value

thepix

reven The documentation doesn't exactly cover this so I have no idea how to log the bitrate, or even where what I have written is pulling the information from?

When I have looked at the logs for Audio Bitrate, it's mostly been shown how I have it in the script and I've used these units in a Video Bitrate checker script which seems to work correctly?

What I presume is the script referenced Video Information log:

2023-03-04 03:59:44.984 [INFO] -> Video Information: Input #0, matroska,webm, from 'D:\Downloads\FileFlows\Usenet\Sonarr\S.W.A.T.2017.S06E15.720p.HEVC.x265-MeGusta\2b1ecdc585dc455b91d067054adf2b51.mkv': Metadata: ENCODER : Lavf59.34.102 Duration: 00:41:35.12, start: 0.000000, bitrate: 1306 kb/s Stream #0:0: Video: hevc (Main 10), yuv420p10le(tv, bt709/unknown/unknown, progressive), 1280x718 [SAR 1:1 DAR 640:359], 23.98 fps, 23.98 tbr, 1k tbn (default) Metadata: ENCODER : Lavc59.54.100 libx265 DURATION : 00:41:35.118000000 Stream #0:1: Audio: ac3, 48000 Hz, 5.1(side), fltp, 384 kb/s (default) Metadata: DURATION : 00:41:35.072000000

Video Bitrate Check script:

function Script() { // from the first video stream let video = Variables.vi?.VideoInfo?.videoStreams[0]; if(video.Bitrate > 3000) return 1; // Convert as per resolution prefernces return 2; // Acceptable Bitrate | Keep As Source }

Result:

2023-03-04 03:59:45.084 [INFO] -> ====================================================================== 2023-03-04 03:59:45.084 [INFO] -> Executing Node 6: Video Bitrate Check [FileFlows.Server.ScriptNode] 2023-03-04 03:59:45.084 [INFO] -> ====================================================================== 2023-03-04 03:59:45.280 [INFO] -> Script result: 2 2023-03-04 03:59:45.280 [INFO] -> Node execution time: 00:00:00.1962367

I'll add the additional "000"'s and see if that makes any difference.

Just a thought, but could the track reference in AudioStreams[0] be pointing at the wrong one?

reven

https://docs.fileflows.com/plugins/basic-nodes/function

Pretty clear in the docs how to log something.

Just

Logger.ILog("Bitrate: " + audio.Bitrate)

thepix

reven Aahhhh, they say knowledge is power!!

Clearly I have none...

reven

well you deleted all the code and now "audio" isnt defined.

Inside a function (not a script, scripts are meant to be shared/reused, functions are easier and per flow)

// gets the FIRST audio stream
let audio = Variables.vi?.VideoInfo?.AudioStreams[0];
if (!audio)
    return -1; // no audio streams detected
Logger.ILog("Bitrate: " + audio.Bitrate);

if (audio.Bitrate > 645)
    return 1; // TrueHD DTS | Convert to 640kbps
if (audio.Bitrate === 640)
    return 2; // Prefered Bitrate | Keep As Source
if (audio.Bitrate < 640)
    return 2; // Acceptable Bitrate | Keep As Source

that will get only the first audio stream, and return an output based on its bitratee, and i added a log to log its bitrate out.

thepix

reven Beautiful, that's now worked. I had previously tried to add it to a new Function in the Flow, didn't realise it needed to be in my Script.

So as you previously suggested, they were in thousands, so that should be fixed now thanks!!

(I need to check my Video Bit Rate Checker now, as although it seems to be working the code looks a little off)