Question: record and convert?

[haste18]

Hi guys,

I'm already recording high quality live streams (.TS / mpeg). One hour tv will be around 5 gb.
I'm trying to figure out if it's possible to automatically save the same stream as a smaller size video (MP4 / AVI) for sharing (ie. YouTube) or automatically convert the TS after the record has completed?

Anybody who can tell me if an option like this is available?

Thanks!

Ruud

[sub]

There is nothing built-in that will do this for you. Some people do this though, by running a command line conversion utility in PostProcessing.bat (which runs automatically after the recording competes).

[Reddwarf]

I used ffmpeg to convert recordings in PostProcessing.bat for a while, got the size down to 1/3 without losing any visible quality, but the drawback is that ffmpeg tends to crash if there is a glitch in the recording, so I wouldn't recommend it.

[Waynesm]

NextPvrEncoder: I use this with Handbrake. Although now no longer under development works well as is for me.
http://forums.nextpvr.com/showthread.php...PVREncoder

[Reddwarf]

NextPvrEncoder: I use this with Handbrake. Although now no longer under development works well as is for me.
http://forums.nextpvr.com/showthread.php...PVREncoder

I also tried Handbrake, but found it incredible slow compared to ffmpeg. My plan now is to have a look at Mencoder...

[haste18]

Thanks for your replies.. I will try ffmpeg and see how things go for a while.

[haste18]

Okay.. so I've figured out the way to manually convert my TS to MP4:

Code:

ffmpeg.exe -i input.ts -codec:v libx264 -profile:v high -preset fast -b:v 500k -maxrate 500k -bufsize 1000k -vf scale=-1:480 -threads 0 -codec:a copy output.mp4

But now I need to to start this with PostProcessing.bat. I tried the following:

Code:

C:\ffmpeg\bin\ffmpeg.exe -i "%1" -codec:v libx264 -profile:v high -preset fast -b:v 500k -maxrate 500k -bufsize 1000k -vf scale=-1:480 -threads 0 -codec:a copy C:\test.mp4

After recording the log file NRecord.log says:
2013-10-16 10:13:25.337 [DEBUG][7] Started recording (1038:10:\\Mxfserver\vo-klt\Engels\Diversen\Opnames\Manual Recordings\testett_20131016_10131014.ts)
2013-10-16 10:13:25.386 [DEBUG][7] No C:\Users\Public\NPVR\Scripts\ParallelProcessing.bat
2013-10-16 10:14:00.283 [DEBUG][7] Stopping recording (1038 on 21). Past end time of recording. 10
2013-10-16 10:14:00.377 [DEBUG][7] StopStream
2013-10-16 10:14:01.368 [DEBUG][7] Starting: C:\Users\Public\NPVR\Scripts\PostProcessing.bat "\\Mxfserver\vo-klt\Engels\Diversen\Opnames\Manual Recordings\testett_20131016_10131014.ts" 31 1038 21
2013-10-16 10:15:53.581 [DEBUG][7] Reloading recording schedule

But nothing happends. Any ideas? What am I doing wrong?

[Reddwarf]

I think the input parameter should be either "%~1" or %1, if you wish an output file with the same name but extension mp4 it should be "%~dpn1.mp4" as output.

[johnsonx42]

No, "%1" is correct. "%~1" is invalid, and %1 without the quotes would break due to the space in the path ("Manual Recordings").

There's a couple of possibilities: one, when NRecord runs a .bat file, it's running as Local System, not your normal user. It could be that Local System doesn't have the permissions it needs to write the file to C:\. Try making a directory for it, and make sure Local System has permissions. Google "command prompt as local system" and you'll find a way to manually launch a command prompt with local system permissions so that you can test your batch file.

two, when NRecord runs a script the starting directory is not what you want it to be... I've forgotten what it is, might be c:\windows\system32 or something like that. you should start with a cd command to a valid directory, like "cd /d c:\temp" if you have a temp folder there, or "cd /d "%dp0"" if you want to run in the NPVR scripts directory.

[mvallevand]

Yes root is a poor choice for testing, but the batch file will also fail on second attempts because it doesn't have the overwrite switch -y

Martin