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Smart Encoding and lower-quality output
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Bryskens
Junior Member
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13. May 2008 @ 06:23 |
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Im having issues to perfom smart encoding file-splitting in various
'fan-applications', since the comersial splitters seems to use trued split instead
I use AVIdemux and various relatives to Virtualdub for AVI,
my problem gets the same on both, the output loose in video quality for some reason, alot worse b/px quality and bitrate, it works thou, but unacceptable :)
in VD i use direct stream copy on everything, and just slide-mark the places and save it out
In AVIdemux i just input, slide-mark and save as, and say yes to every prompts it suggest (its accually enough to just say yes to smart encoding for it to get worse quality output i have concluded)
what am i doing wrong thath makes 2 programs to lower the quality? i have talked to some people and it should not lower it, its harder to get a solution from them thou, so do you have any instead?
or do you have any other program thath you know splitt smart without lowering Quality thath you can instruct?
/Thanks in advance
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AfterDawn Addict
1 product review
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13. May 2008 @ 13:04 |
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If you choose "Copy" for video and audio, it should not re-encode, which means it should not lower the quality.
Try this Free application for splitting AVIs:
http://www.solveigmm.com/?Products&id=AVITrimmer
It works good for me, fast, no quality loss at all.
 Piss me off, and I Will ignore You! |
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Bryskens
Junior Member
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13. May 2008 @ 16:02 |
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Originally posted by cyprusrom:
If you choose "Copy" for video and audio, it should not re-encode, which means it should not lower the quality.
Try this Free application for splitting AVIs:
http://www.solveigmm.com/?Products&id=AVITrimmer
It works good for me, fast, no quality loss at all.
Its sett on copy on both as it is deafult yes, i even tested to reinstall program, but it still same issue, i dont wanna give up on this program so if somebody else use this program shout here please
I tested solveigmm and i like it, i wonder if it will be so free in 21 days thou when the evaluation ends? wich functions will be locked down? :P
Im a bit suspicios over the output result i got with it allso, when checking it in videoinspector the 'Bitrate' and 'quality factor' column gets disabled in a gray color i have never seen before, you can still read 1 Kpbs and 0.00 b/px under it thou
i must say thath when playing input and output together side by side, my 3 eyes atleast doesnt react on any noteable quality loss, but i cant trust my eyes..so either this 0-results in videoinspector indicates thath it is accually cloned values from another file..or the quality really becomed thath crappy on output
i have not changed any settings at all since install..so your experinced answer on the reality must alone make me judge if to celebrate ore flush this program :)
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AfterDawn Addict
1 product review
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13. May 2008 @ 16:20 |
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The quality does not change. I don't know why video inspector reports what it does. Check it with GSpot.
The Avi Trimmer is free, no trial period.
I do use Avidemux and I have never had any issue with it.
Piss me off, and I Will ignore You!
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Bryskens
Junior Member
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14. May 2008 @ 08:44 |
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Originally posted by cyprusrom:
The quality does not change. I don't know why video inspector reports what it does. Check it with GSpot.
Its kind of hard i think to direct-translate the videoinspector values with G-spot values but i can conclude thath the video-values are lower in Gspot allso, however since you say this is free, i wonder if i really got the right version? and not a handicapped one thath spits out low-quality chunks
Originally posted by cyprusrom:
The Avi Trimmer is free, no trial period.
http://www.solveigmm.com/?Products&id=AVITrimmer
Just to tell you what i do, there are not download link in thath link-window, so instead press "download" on menu and choose SolveigMM_Video_Splitter_2_1.zip (and 2.0)
install and it directley inform thath this is a 21 day evaluation version, are you sure on this? :) but i agree thath thei allso say its free..but not for me (as Elton John sang)
this is confusing
Originally posted by cyprusrom:
I do use Avidemux and I have never had any issue with it.
The only thing i can come up with..would be if there are any known preferences settings in AVIdemux thath should be enabled/disabled to prevent re-encode but arent in my case..cause of perhaps old registry remains from old installations
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AfterDawn Addict
1 product review
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14. May 2008 @ 09:04 |
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Quote:
Originally posted by cyprusrom: The Avi Trimmer is free, no trial period.
http://www.solveigmm.com/?Products&id=AVITrimmer
Just to tell you what i do, there are not download link in thath link-window, so instead press "download" on menu and choose SolveigMM_Video_Splitter_2_1.zip (and 2.0)
install and it directley inform thath this is a 21 day evaluation version, are you sure on this? :) but i agree thath thei allso say its free..but not for me (as Elton John sang)
this is confusing
That's because you chose the "splitter" instead of the "trimmer". The trimmer is free, the splitter is not. Scroll down on that page to the bottom and you have the download link for the TRIMMER!!!
I am really not sure what values you are looking at,but GSpot shows kbps bitrate and QF. Obviously the values reported with Video Inspector are not right. At 1kbs and 0 Qf the video would probably look like seen through some end stage Glaucoma eyes.
I went back to the movies I split with the Avi Trimmer, and GSpot reports the right numbers.
As for Avidemux, why is re-encoding, don't know. Won't be home for a while,will play with it in the evening.
Do you keep the same container with Avidemux?
Piss me off, and I Will ignore You!
This message has been edited since posting. Last time this message was edited on 14. May 2008 @ 09:10
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Bryskens
Junior Member
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14. May 2008 @ 13:18 |
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Originally posted by cyprusrom:
That's because you chose the "splitter" instead of the "trimmer". The trimmer is free, the splitter is not. Scroll down on that page to the bottom and you have the download link for the TRIMMER!!!
LOL, i thauth i hade scrolled down to the bottom of the homepage allready, and not to attentive at the top either
But its wery interesting now, cause now i have 3 programs thath downgrades output, Virtualdub, Avidemux, and last SolveigMM AVI Trimmer :)
Originally posted by cyprusrom:
I am really not sure what values you are looking at,but GSpot shows kbps bitrate and QF. Obviously the values reported with Video Inspector are not right. At 1kbs and 0 Qf the video would probably look like seen through some end stage Glaucoma eyes
Here are some picures over my last vacation in San Jacinto, thath will probably clear things out
Another file this time, thath did not show thath Glaucoma value in the inspector, but shitty values
Originally posted by cyprusrom:
Do you keep the same container with Avidemux?
I dont know about how to view?..container in thath program, i do know thath i can choose a direct 'stream copy' counterpart in main window, and to view container values in G-spot, if either thath was what you meaned?
Some other user at another forum now unexpected claims this
Originally posted by GodofaGap:
If you use DSC in VirtualDub and the equivalent in AVIdemux the bitrate changes because the files were encoded with a 2 pass VBR mechanism, which means the bitrate can vary between different parts. This only becomes visible when splitting but this not a lowering of the quality. The quality cannot be lowered since the programs are simply passing on the encoded data from one file to another.
The behavior you are seeing is normal. Bitrate and bpp are not indicators of quality. Otherwise show a screenshot where quality was lowered while using DSC.
Even if the input is a none VBR audio file he think its natural to get lower values
Originally posted by GodofaGap:
video is VBR by nature. ABR is just a special case of VBR where the bitrate only fluctuates within certain bounds and 1 pass quality based is basically the same as a 2 pass VBR mechanism (with the exception of knowing the resulting file size)
shall we trust him? :)
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AfterDawn Addict
1 product review
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14. May 2008 @ 16:46 |
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That sounds like a reasonable explanation, from a knwoledgeable person.
One thing I know for sure: I never use any programs to check bitrate/quality scores...The only quality testing that I use are my own two eyes. If they are pleased, it's all that matters. When I enjoy a movie, I don't do it by watching a screenshot of some benchmarking software, but I actually watch the video.
It is possible that the numbers (kbps/Qf) reported by programs like Video Inspector, GSpot...have changed in the past when I split/processed some videos with Avidemux for example(I never really used Avidemux for splitting, but a lot for joining 2 or more videos), but it simply did not matter since the end result looked identical, so I never bothered to check. The only time i use one of those applications is when I want to check the fps(PAL/NTSC), codec used...could care less about what they report quality-wise->I use my eyes for that.
Piss me off, and I Will ignore You!
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Bryskens
Junior Member
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14. May 2008 @ 18:18 |
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Originally posted by cyprusrom:
That sounds like a reasonable explanation, from a knwoledgeable person.
One thing I know for sure: I never use any programs to check bitrate/quality scores...The only quality testing that I use are my own two eyes. If they are pleased, it's all that matters. When I enjoy a movie, I don't do it by watching a screenshot of some benchmarking software, but I actually watch the video.
It is possible that the numbers (kbps/Qf) reported by programs like Video Inspector, GSpot...have changed in the past when I split/processed some videos with Avidemux for example(I never really used Avidemux for splitting, but a lot for joining 2 or more videos), but it simply did not matter since the end result looked identical, so I never bothered to check. The only time i use one of those applications is when I want to check the fps(PAL/NTSC), codec used...could care less about what they report quality-wise->I use my eyes for that.
Yes i guess you are right, using eyes is enough,
i was so eager to get it gonig cause im running out of HD space so i started two threads
here it is http://forum.doom9.org/showthread.php?p=1137211#post1137211
perhaps we all can learn something from this proffesors
thanks for your help thou, alot better follow up than users on some other forums
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