I wish I had a volume control ....

[mvallevand]

Hi Sub,

The settings only seem to work for live tv not on recorded videos (mp4).

Do you mean mp4 that you have created yourself from .ts. You might be the source of the problem either in transcoding or in system setup of mp4. NextPVR doesn't really play much of role in mp4 playback.

Martin

[stustunz]

yeah thats the bit that has me stumped also thats the reason i want a sample

[puck64]

ffdshow and ac3 filter can boost
I am not sure exactly what file you are getting from recordings so cant give exacts on what to use without a sample
(use this and upload somewhere http://www.nextpvr.com/nwiki/pmwiki.php?...y.CutChunk )

Hi Stustunz,

This is not an NextPVR recording, but rather a generic mp4 problem (all my recordings from NPVR and downloads are in mp4)

Typically I use FFmpeg built on Kubuntu for Windows (64 and 32bit bit) to make the conversion from .ts to .mp4. My last build of FFmpeg was 2016-02-11.

I apply normalisation ie. get max_volume and boost the audio by that amount up to a max of 9dB.
EG. Speedweek 2016-05-08 has a max_volume of -9.9 dB so my audio processing is ...
-acodec libfdk_aac -ab 192k -ar 48000 -ac 2 -filter:a volume=9dB -isync

If the audio is ac3 I then apply DRC ....
FFMPEG -drc_scale 4 -I "file.mpg" .......... etc

or I use Handbrake 0.10.2.7286 (the last with LibFDKAAC) or MeGUI to convert to mp4.
If the volume seems a bit low I can and do process the file via FFmpeg as video copy and Audio bost..
-acodec libfdk_aac -ab 192k -ar 48000 -ac 2 -filter:a volume=3 or 6 or 9dB -isync.

Even with all this processing my volume is low in NPVR. WDTV, Sony TV and Apple TV (when I set it up) are all ok.:confused:

I hope this fills you in with what I am doing and how I do it to achieve what I want

[puck64]

yeah thats the bit that has me stumped also thats the reason i want a sample

Where can I put the clip ... too big to attach here

[mvallevand]

Where can I put the clip ... too big to attach here

I don't think uploading an mp4 isn't going to help. Unless things have changed playback of mp4 is controlled by Windows DirectShow not NextPVR. I'd try downloading graphEdit plus and try to play the mp4 wtih it and then change the merit of the Windows default decoders to one that is more agreeable.

Martin

[sub]

Would I be correct in guessing that ffmpeg is only used for transcoding? :o

It's used for very little. At this stage it's only used to view non-supported file types on a Hauppauge MediaMVP client (by transcoding them to .ts).

[stustunz]

Yip martin is onto it since you have converted it. its now upto windiws to decide on decoders etc
Dont worry about uploading you need to sort it from your end by first finding out what windows uses then tweaking/ changing the decoders

Although if you post a screen dump of the filter check wr might be able to point you t better decoder choices or where the problem might be

[puck64]

Yip martin is onto it since you have converted it. its now upto windiws to decide on decoders etc
Dont worry about uploading you need to sort it from your end by first finding out what windows uses then tweaking/ changing the decoders

Although if you post a screen dump of the filter check wr might be able to point you t better decoder choices or where the problem might be

Hi,

See post 6 in this thread for my used decoders and below for available decoders ....

[ATTACHMENT NOT FOUND]

and

[ATTACHMENT NOT FOUND]

Thank you for all your help so far

[mikeh49]

The decoders in the screenshot are what's available for NPVR to use for the native .ts files created by NPVR. For any other files, including your mp4, NPVR just says "Hey, Windows, play this file." Windows decides the decoders based on its own priority system and logic. Using a filter manager (a decoder is a filter in Windows-speak) or a decoder manager, you may be able to see the priority used by Windows. In the past, I've used Direct Show Filter Manager which will show the "merit" (Windows term for priority) of each decoder.

Or as Martin suggested, if you get the grafedit utility, and just pick your file and select play, you may see the filter graph that Windows builds to play the file. The graph will show the decoders and other elements that it connects to play the file.

I don't know if any of this stuff works on Win 10, if that's what you're using.

[puck64]

The decoders in the screenshot are what's available for NPVR to use for the native .ts files created by NPVR. For any other files, including your mp4, NPVR just says "Hey, Windows, play this file." Windows decides the decoders based on its own priority system and logic. Using a filter manager (a decoder is a filter in Windows-speak) or a decoder manager, you may be able to see the priority used by Windows. In the past, I've used Direct Show Filter Manager which will show the "merit" (Windows term for priority) of each decoder.

Or as Martin suggested, if you get the grafedit utility, and just pick your file and select play, you may see the filter graph that Windows builds to play the file. The graph will show the decoders and other elements that it connects to play the file.

I don't know if any of this stuff works on Win 10, if that's what you're using.

Hi Mike,

I found GraphStudioNext (x64) in K-Lite.
I opened a file ... "Seconds From Disaster S04E05 Alpine Collision [ABC2].mp4" in Windows Media Player and got this ...

[ATTACHMENT NOT FOUND]

Try as I may, I could not get it to see what NextPVR uses to play the same file.

It is still my belief that NextPVR does not output Audio at a high enough level.
Windows Media Player and Films & TV play the same file at a much higher volume than NextPVR

BTW: what does the 5 stars mean on this thread :confused: