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Old 6th January 2020, 01:19   #3301  |  Link
Mike-uk
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if you used the trim command and made small clips then upload them to google drive then share the link
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Old 6th January 2020, 02:02   #3302  |  Link
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? that's 2 different movies, you ned to compare with the same movie and same time frame
Yes, of course, but I do not think that this is even necessary...

Comparing the logs I noticed that "Olymus has fallen" uses the ColorMatrix command to convert the colorimetry from HD (Rec.709) to SD (Rec.601). And this results in correct colors.

"Angel has fallen" does not use the Colormatrix command, and this results in darker and more greenish colors. This is an indication that the source file uses Rec.709, but is incorrectly flagged so AVStoDVD cannot recognize the source colorimetry.

This can be easily fixed by adding the ColorMatrix command manually.

https://i.postimg.cc/0Q1wyyPZ/Colormatrix.png

Add the Colormatrix command and use a source value of 0 and a target value of 2. This should fix it.

In any case your issue has nothing to do with the audio conversion. The FFmpeg AC3 encoder should have a slight edge over Aften these days, but I doubt that you will be able to hear the difference.


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Old 16th January 2020, 23:47   #3303  |  Link
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Well, one thing for sure is that the menu is bleeding into the picture. I just opened Olympus Has Fallen which was made with the Red background Menu and it bleeds through the picture and characters. Now, sometimes it doesn't happen because I would of noticed it, so maybe it's menu specific as there's a natural color menu also provided. I'll do the same movie with the different audio codecs just for checking that issue out. Man, you guys can't snatch an .mp4 from one of the hundreds of sites available and test it out for yourself? I'll do kit but you doing your own conversions will be even better. I'm not tinkering with any settings other than the Audio and a different menu, so you could do the same. I'll post back the logs.


Sometimes the menu bleeds into the picture and sometimes it doesn't. Now I've compared the original file to the two conversions and even at DVD-9 they weren't as clear as the original. Sometimes it's as clear as anything.

https://filebin.net/5mqvdamyolbg0fc0...log?t=ep26lzmb https://filebin.net/5mqvdamyolbg0fc0...log?t=ep26lzmb First is with Aften and Second with AviSynth. See if you can spot anything. Thanks.

The original did have a color discrepancy with a little red in the beginning and creeping through here and there. So if anything if we can try to see where we can make FFMpeg put out a better conversion.

Last edited by dr_ml422; 17th January 2020 at 01:25. Reason: additional info.
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Old 17th January 2020, 07:30   #3304  |  Link
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Well, one thing for sure is that the menu is bleeding into the picture. I just opened Olympus Has Fallen which was made with the Red background Menu and it bleeds through the picture and characters.
I went through your log files, and I could no see any problems.

"Menu bleeding into the picture" is not possible technically (unless some Voodoo is going on inside your computer). The encoder (FFmpeg in your case) has no knowledge whatsoever about the menu you have created. Could it be that your subtitles have a funny color which shines through even in sections without subtitles? Try to make an encode with subs disabled.

For your encoder settings you are using CBR mode at the highest possible bitrate of 8500 kbps. This should give you a good quality encode, but for even better quality you can try to use HCenc 2-pass VBR mode instead.

This "Menu bleeding through" thing is something nobody else has ever experienced, so I will believe it when I see it. Upload a short section of an encode which shows the issue together with the same section cut out from the source file...

Last edited by manolito; 17th January 2020 at 09:28.
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Old 22nd January 2020, 00:15   #3305  |  Link
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I checked my sources and there's some with bad coloring so that was that. I think I should keep it at DVD-5 since the sources are just @ 1-2GBs... Maybe stretching it out made it downgrade the quality. I have it set to default value with encoding, which picks what's best according to the source. I'll try this HCenc 2-pass VBR mode and see what happens. Sometimes I get really great quality encodes, and sometimes not. So I don't know if the better ones are when it decides to use HCenc...
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Old 22nd January 2020, 11:23   #3306  |  Link
manolito
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Originally Posted by dr_ml422 View Post
I checked my sources and there's some with bad coloring so that was that.
This is what I suspected right from the beginning...

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Originally Posted by dr_ml422 View Post
I think I should keep it at DVD-5 since the sources are just @ 1-2GBs...
It does not have much to do with the size of your source files. The source files are already compressed, and the size of the sources depends on the efficiency of the compression codec. MPEG2 is not very efficient, MPEG4-ASP (Xvid, DivX) is almost twice as efficient, then comes AVC (aka H.264), and HEVC (aka H.265) is the most efficient video compressor today. (I left out other formats like VP8, VP9 or AV1).

If your source is compressed with HEVC and it has a size of 700 MB, then converting it to MPEG2 (which is used for DVD) you will likely get a size of more than 5 GB for a comparable quality.

What matters instead is the lenght of your video and the characteristics (compressability) of the video. A clip with little motion, low details and darker textures will need less bitrate than a high action clip with lots of motion, fast cuts, high details and complex textures like fog for the same quality.

My rule of thumb is that for an average movie up to a duration of a little over 2 hours a DVD-5 will be big enough for very good quality.

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Maybe stretching it out made it downgrade the quality.
No way...

Quote:
Originally Posted by dr_ml422 View Post
I have it set to default value with encoding, which picks what's best according to the source. I'll try this HCenc 2-pass VBR mode and see what happens. Sometimes I get really great quality encodes, and sometimes not. So I don't know if the better ones are when it decides to use HCenc...
Generally if you use a high bitrate (above 7000 kbps) the encoder quality is less important than for a medium or low bitrate encode. For high bitrates AVStoDVD uses FFmpeg CBR, for bitrates below 6000 kbps it uses HCenc 2-pass VBR (slightly different algo for a single core CPU).

The FFmpeg parameters are simple and not optimized for quality. But at high bitrates this does not necessarily mean that the resulting encode
will look bad. But if your computer is fast and you want the best possible quality each and every time, then you should always use HCenc 2-pass VBR mode.

Last edited by manolito; 22nd January 2020 at 11:31.
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