Question: record and convert?

[Reddwarf]

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.

I'm pretty sure the %1 parameter comes with qoutes.

[johnsonx42]

I'm pretty sure the %1 parameter comes with qoutes.

Yes, you're right, NPVR does pass the quotes along. My bad, %1 is correct with no quotes. Also had a typo in my cd examples, the last should have been cd /d "%~dp0".

[haste18]

Thanks guys for the help. I've got it all working now.

Just wondering about something else. I'm recording radio and tv. Is it possible to check after recording if the .TS contains a video stream? If so then execute ffmpeg to convert audio + video to MP4.. if not then execute ffmpeg to convert audio with a still image.
I need to upload radio recordings to YouTube. They don't accept audio without video. So i need to attach a still image so it looks lika a video.

Any examples how this can be fixed within a batch file?

Thanks!

[Zeb]

The usual way of creating "slide shows" with still image(s) and a soundtrack is with video-editing software. I have some slide show music videos on YouTube, however I did not use NextPVR to record the audio. I used Audacity (which is free) to record, edit and export audio as WAV; then used Adobe Premiere Elements 4 (not free, older version and does not support .ts files) to add JPEG images and export as Flash video for uploading to YouTube. Good luck coming up with a batch file that can do that. [Edit] Oh yeah, also used Photoshop Elements to crop and resize images.

[vintdiesel]

Reddwarf wrote:

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.

Agreed, I used to have that problem over a year ago, however an update to ffmpeg made that problem go away for me. Yes there was a glitch and some pixelation that clears in a few seconds, but still very watchable.

Due to the ffmpeg running the CPU at 100% making the fans in my PC go hard, I schedule to run after midnight. IIRC Handbrake has an inbuilt facility to do just that, but I had already created a script using solely ffmpeg.

[haste18]

The usual way of creating "slide shows" with still image(s) and a soundtrack is with video-editing software. I have some slide show music videos on YouTube, however I did not use NextPVR to record the audio. I used Audacity (which is free) to record, edit and export audio as WAV; then used Adobe Premiere Elements 4 (not free, older version and does not support .ts files) to add JPEG images and export as Flash video for uploading to YouTube. Good luck coming up with a batch file that can do that. [Edit] Oh yeah, also used Photoshop Elements to crop and resize images.

Hmm.. this is not what I'm asking. The ffmpeg supports converting audio + image = video. That's not the problem. The problem is the way to detect if NPVR recorded audio (radio) or video + audio (tv). If audio only is recorded, I need to add a still image, so it becomes a video with audio and can be uploaded to YouTube.

I'm looking for a way to detect if a file contains a video stream. If it does, then convert audio + video to MP4 if it doens't, then convert audio + still image (video.jpg) to MP4.

Anybody any idea?

[martint123]

One of the items passed to postprocessing.bat is the channel number.
I guess you could use this to determine if a recording is radio or not???

http://www.nextpvr.com/nwiki/pmwiki.php?...Files#toc5

[haste18]

One of the items passed to postprocessing.bat is the channel number.
I guess you could use this to determine if a recording is radio or not???

http://www.nextpvr.com/nwiki/pmwiki.php?...Files#toc5

Thanks, i've found the solution:

Code:

IF %2 LEQ 4 (
C:\ffmpeg\bin\ffmpeg.exe -y -i %1 -codec:v libx264 -profile:v high -flags +cgop -preset slow -b:v 5000k -maxrate 5000k -bufsize 1000k -r 25 -c:a aac -strict experimental "%~dpn1.mp4"
) else (
C:\ffmpeg\bin\ffmpeg.exe -loop 1 -i c:\audio.jpg -i %1 -shortest -c:v libx264 -preset medium -tune stillimage -c:a aac -strict experimental -b:a 192k -pix_fmt yuv420p -crf 18 "%~dpn1.mp4"
)

So if the channel number is less then or equals 4, then it's a video otherwise it's audio! Great!!