Page 2 of 2

Re: What is your favourite quality

PostPosted: Tue May 02, 2017 5:51 pm
by Morpheus
I picked 1080 - up to about 2 gig per file. Good resolution and quality for a reasonable download speed.

720 (1280 h) - up to about 1.2 gig per file is next step of preference. if 1080 is not available.

I won't bother with 480 video for my 55" screen... and I can't be bothered waiting for a 20-50 gig bluray untouched to download.

A nice 1080 @ 2 gig, about 2k - 4k butrate, that's good enough for me, no major blockies (if i really notice them then the film is not catching my attention anyway!).

Re: What is your favourite quality

PostPosted: Wed May 03, 2017 9:18 am
by karipap
1080p BRRIP is my favourite.

Please keep audio quality multi channel (5.1) at least for 1080p because 2 channel isn't enough for home theater. I back to this site after I can download recent movies with 5.1 channel.

Re: What is your favourite quality

PostPosted: Wed May 03, 2017 4:36 pm
by Morpheus
[quote="karipap"]
1080p BRRIP is my favourite.

Please keep audio quality multi channel (5.1) at least for 1080p because 2 channel isn't enough for home theater. I back to this site after I can download recent movies with 5.1 channel.
[/quote]

I'd agree wtih that - not because 5.1 is useful to me but because i can use a simple ffmpeg script to demux, convert to stereo with volume normalisation, and remux, quickly (a few mins)

Nearly all the films have the speaky track way too low and the boomy explodey tracks way to high...

But stereo to stereo is less successful for doing the changes (ffmpeg can take centre and "exaggerate" it over the other 4.1 tracks.... but stereo already has the voices encoded int the "left-right" and it's difficult to separate them from normal voice-frequency sounds.

*****************

So, yeah, 5.1 is good too - so long as the file size stays reasonable... let's say 2 1/2 gig with 5.1 audio?

*****************

Why is "quote" not working?

Re: What is your favourite quality

PostPosted: Mon May 08, 2017 6:21 am
by horas93
mp4 and mkv to download in bliztcinema

Re: What is your favourite quality

PostPosted: Mon May 08, 2017 11:35 am
by sam_buster
Seems voting has closed but I would have voted for 720p compressed.

I also prefer stereo audio to 5.1ch - the difference in flie size is considerable, especially over mutiple movies, and for my needs the extra channels are overkill.
However Morpheus' comments might convince me to change my opinion of 5.1 - I too often struggle to pick out the dialogue in some movies.

Re: What is your favourite quality

PostPosted: Mon May 08, 2017 8:15 pm
by Morpheus
[quote="sam_buster"]Seems voting has closed but I would have voted for 720p compressed.

I also prefer stereo audio to 5.1ch - the difference in flie size is considerable, especially over mutiple movies, and for my needs the extra channels are overkill.
However Morpheus' comments might convince me to change my opinion of 5.1 - I too often struggle to pick out the dialogue in some movies.[/quote]

A quick "how to" (it doesn't have to be done this way, it's just a decent way i do it)

OK - ffmpeg and mktoolnix needed.

Made up filename - pop.mkv, video + 5.1 audio.

mkvtools - drop in the video, deselect everything BUT the audio file - hit [go] - result is pop.mka

edit script one to use that file name, run it.
Wait for it to finish and read the line

[Parsed_volumedetect_0 @ 0x7f8ba1c121a0] mean_volume: -16.0 dB
[Parsed_volumedetect_0 @ 0x7f8ba1c121a0] max_volume: -5.0 dB ***************** this line ignore the minus sign, you just want the numbers.

note the number - 5.0 as here.

edit script 2 to use the filename AND that number (you can edit the bitrate if you wish, 160 is a decent compromise between size and quality)... run it... wait for it to finish - result is pop.mp3

Now open mkvtools - drag both the original video file AND the new mp3 file into it
select only the video portion of the file and the mp3 (and chapters/subtitle if you have them) - deselect the original audio part of the file.
hit the [Go] button

result is a new mkv file with the stereo mp3 in in.

script 1 (copy it without the ******)

**************************
D:\Downloads\ffmpeg.exe -i "E:\Phantoms 1998 1080.ac3" -af volumedetect -f null -
pause
**************************

Edit the "d:/downloads..." to use your path to ffmpeg
edit the "Phantoms..." to your video filename.
"pause" is there to give you time to read the line.

script 2

**************************
D:\Downloads\ffmpeg.exe -i "E:\Phantoms 1998 1080.mka" -map 0:a:0 -f mp3 -acodec mp3 -b:a 160k -ac 2 -af pan=stereo:FL=0.25*FL+FC+0.6*LFE:FR=0.25*FR+FC+0.6*LFE -af "volume=2.2dB" "E:\Phantoms 1998 1080.mp3"
**************************

edit the path at the start
edit input filename
edit output filename
edit "volume=2.2dB" to match the number you found for your file

This will convert 5.1 to stereo with enhances centre speaky track AND normalise volume (so many have low volumes... I've had my TV up to 95/100 and still hard to hear on some films)

if you don't want volume changes then delete the bit ---
-af "volume=2.2dB"

****************
OK?

Test samples:

original

s000.tinyu---pload---com/index.php?file_id=02790976580636914033

Basic 5.1 THX video sample

"fixed"

s000.tinyu---pload---com/index.php?file_id=00584560659435399499

now stereo and with a 9.1 db boost.

Try running the first file through the scripts.

EFFINg hell... "not permitted to post links"...

OK... remove the "---"

Re: What is your favourite quality

PostPosted: Tue May 09, 2017 10:15 am
by sam_buster
[quote="Morpheus"]
A quick "how to"
[/quote]

Many many thanks, Morpheus, I shall look into this at the weekend.