When exporting to MPEG-4 H.264 in MEP, within the H.264 encoder settings menu/dialog, I cannot see an option for CRF (Constant Rate Factor). The options I get are Constant Bitrate, Variable Bitrate, Constant Quantizer, and Target Quality. Are either one of these options the same as CRF just under a different name?
Hi
IMHO we are continuing to go round in circles, under various guises, of what is basically one issue - improving/maintaining DVD quality source video when exporting, and the answer can be best summarised as:
the default settings for the preset export templates have already been optimised by Magix and there is little to be gained from changing them.
Changing any of the advanced settings in the export dialogs is unlikely to result in any significant increase in visual quality, you are already starting with a low resolution pre-compressed video.
Making changes to the advanced export settings and/or the burn settings if writing to disc, will deviate from the already optimum settings with probable result of unplayable video files, large file size increases, lower quality video and/or unplayable discs.
John EB
Forum Moderator
I think John, that some of the people here are looking for some form of enhancement program which is entirely a different type of problem. They don't realise that once they edit anything it needs re-encoding and that there is no way out of that. They are confusing editing with disc mirroring which is an equivalent of copy and paste to disk. Something like DVD Fab.
Even the very top Pro editing programs can't get around this problem.
Hi
IMHO we are continuing to go round in circles, under various guises, of what is basically one issue - improving/maintaining DVD quality source video when exporting, and the answer can be best summarised as:
the default settings for the preset export templates have already been optimised by Magix and there is little to be gained from changing them.
Changing any of the advanced settings in the export dialogs is unlikely to result in any significant increase in visual quality, you are already starting with a low resolution pre-compressed video.
Making changes to the advanced export settings and/or the burn settings if writing to disc, will deviate from the already optimum settings with probable result of unplayable video files, large file size increases, lower quality video and/or unplayable discs.
John EB
Forum Moderator
Hello,
Thank you for your comment, however, my question in fact wasn’t referring to one of my other topics related to improving/maintaining DVD quality.
Hi
. . . . Thank you for your comment, however, my question in fact wasn’t referring to one of my other topics related to improving/maintaining DVD quality. . . . .
I stand corrected.
Depending on the codec being used, CRF is the Coding Quality (Intel codec) or Performance (MainConcept codec) option in the Advanced export dialog. They are a restricted range of the possible values that CRF can have.
Testing the extremes of the settings with high detail 4K video, there is no discernible difference in the visual or motion quality, however as I have said before, adding sharpness, with a value of about 30, does improve the visual quality.
HTH
John EB
Hi
. . . . Thank you for your comment, however, my question in fact wasn’t referring to one of my other topics related to improving/maintaining DVD quality. . . . .
I stand corrected.
Depending on the codec being used, CRF is the Coding Quality (Intel codec) or Performance (MainConcept codec) option in the Advanced export dialog. They are a restricted range of the possible values that CRF can have.
Testing the extremes of the settings with high detail 4K video, there is no discernible difference in the visual or motion quality, however as I have said before, adding sharpness, with a value of about 30, does improve the visual quality.
HTH
John EB
Okay.
So what’s the difference between the constant quantizer setting and the target quality setting?
. . . . constant quantizer setting and the target quality . . . .
To all intents and purposes they are the same. If you want to know more see this article.
HTH
John EB