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| AEN007 |
| Posted: Jul 30 2011, 03:27 PM |
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Advanced Member
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| QUOTE (AEN007 @ Jan 24 2011, 06:48 PM) | | QUOTE (Placio74 @ Jan 10 2011, 10:13 AM) | | Use MediaInfo and compare video files properties. |
Dirk Paehl has a freeware collection of portable utilities -
including an MediaInfo alternative, which I have found gives some spec info the MI normally does give but does not seem to give on YT flv downloads (e.g., video bitrate)
The DPMI gui sucks ... but might be of use in some cases. |
Dirk Paehl has a new MediaInfo release with a MUCH better GUI ... |
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| AEN007 |
| Posted: Jan 6 2012, 11:26 PM |
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Advanced Member
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7January2012
| QUOTE (AEN007 @ Jan 10 2011, 03:01 PM) | YT transcodes files uploaded to YT - but to what format/specs I do not know.
My point/question is - can one pick a download format that will not require another round of transcoding? |
This week I finally realized a better way to re-dub YouTube downloads.
I can download YT flv vids with dimensions that I prefer.
I can DirectStreamCopy the video to avi.
I always customize/enhance the audio track.
| QUOTE (ale5000 @ Jan 10 2011, 10:17 PM) | Until someone create an ACM codec for AAC
you can't convert or play the aac audio in VirtualDub,
so the only solution is extract audio, process in a different application
then re-add it throgh Audio menu => Audio from other file |
aviDemux will spit out aac audio from flv files.
Many/Most of these YT downloads (now) come down at rather low bitrate.
A DSC avi output of low bitrate flv file will not only be a smaller size
than a full re-dub at a higher bitrate but also a better quality (right?)
I mean, there is NO WAY to redub a video and
have the output be better than the input ... right?
| QUOTE (AEN007 @ Mar 10 2009, 05:30 PM) | In any case I would like to confirm/clarify the following.
There is no point in using a bitrate higher than the bitrate of the source file -
whether opened directly by VD or via aviSynth in VD, correct? |
| QUOTE (phaeron @ Mar 11 2009, 03:03 AM) | | As for using a higher bitrate than the source, the answer is actually yes, there can be a point. The reason is that you're not actually guaranteed that the encoder's heuristics will perform optimally when recompressing source, so you may actually need higher bitrate to maintain good quality. The better the encoder, the less of an issue this is. |
These YT downloads come down @ 29.970.
When I did/do full redubbing, I change the output frame rate to 23.976.
I haven't found a way to change the frame rate of the output file.
When I DSC flv to avi and change the frame rate,
the output is "jerky" ... like lots of frames were dropped.
It would be great to hear if anyone knows of a solution/work-around ... |
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| Placio74 |
| Posted: Jan 7 2012, 07:40 PM |
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VideoAudio
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| QUOTE (AEN007 @ Jan 7 2012, 01:26 AM) | ...
| QUOTE (ale5000 @ Jan 10 2011, 10:17 PM) | Until someone create an ACM codec for AAC
you can't convert or play the aac audio in VirtualDub,
so the only solution is extract audio, process in a different application
then re-add it throgh Audio menu => Audio from other file |
aviDemux will spit out aac audio from flv files.
... |
ACM decoder for AAC is currently available. We can play and convert AAC audio in VirtualDub. Also is possible to extract AAC audio (may be necessary to enable Add an ADTS header to each AAC frame option (in plugin options) when import video file).
| QUOTE (AEN007 @ Jan 7 2012, 01:26 AM) | ...
I mean, there is NO WAY to redub a video and
have the output be better than the input ... right?
... |
Sometimes it is possible to obtain a relatively 'better' output video - using some postprocessing filters, for example MSU Smart Deblocking filter.
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VideoAudio.pl - Serwis o technologii wideo & audio |
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| AEN007 |
| Posted: Jan 8 2012, 09:28 AM |
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| QUOTE (Placio74 @ Jan 7 2012, 07:40 PM) | ACM decoder for AAC is currently available.
We can play and convert AAC audio in VirtualDub.
Also is possible to extract AAC audio (may be necessary to enable
Add an ADTS header to each AAC frame
option (in plugin options) when import video file). |
That's a welcome surprise!
I installed the 32bit version. ViDub now plays aac in flv,
but it sounds like the chipmunks.
Export works, but the wav output is about half the duration of the video
& sounds like the chipmunks.
I'm wondering what the complications are?
Where are "PLUGIN OPTIONS"?
| QUOTE (Placio74 @ Jan 7 2012, 07:40 PM) | Sometimes it is possible to obtain a relatively 'better' output video -
using some postprocessing filters, for example
MSU Smart Deblocking filter. |
Of course, things like cropping off video distortion around the edges & etc
could improve the video in some ways, but every re-dub is "lossy" ....
no matter what the bitrate is. Right?
(I'll have to check out the MSU ...)
A DSC output of a source video @ 300 will be better quality (in general)
than a re-dub ... no matter how much higher the new bitrate is ... |
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| ale5000 |
| Posted: Jan 8 2012, 12:46 PM |
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| QUOTE (AEN007 @ Jan 8 2012, 10:28 AM) | I installed the 32bit version. ViDub now plays aac in flv,
but it sounds like the chipmunks.
Export works, but the wav output is about half the duration of the video
& sounds like the chipmunks. |
Post a sample of a flv file where the audio doesn't work correctly in VirtualDub.
But first check if you have an updated version of the FLV input plugin.
--------------------
New VirtualDub forum
VirtualDub AIO (All-in-One installer for VirtualDub and plugins)
Codec Toolbox RS (A tool to read/change merit of codecs and many other things)
Input plugins for VirtualDub / ACM codecs / VFW codecs |
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| AEN007 |
| Posted: Jan 8 2012, 03:17 PM |
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Advanced Member
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8January2012
OK, not having FLV v2.0 seems to have been the problem. THANX!
Is there some/place/way to register to be notified of fcchandler updates?
This will be the 2nd time that I have put aviDemux into use & then shortly thereafter removed it ...
Just a few notes»
ViDub with FLV v2.0 took about 3 minutes to spit out a wav file
that took aviD 20+ minutes to spit out ...
ViDub wav file: duration~02:35:38.767 size~896521632
aviD wav file: duration~02:35:38.840 size~896528684
flv file: (audio) duration~02:35:38.857
| QUOTE (AEN007 @ Jan 8 2012, 09:28 AM) | | Where are "PLUGIN OPTIONS"? |
I'm also (still) wondering why I keep finding TT_VTX.log files
in my ViDub & VDM directories on 1 (& only 1) of my XP laptops ...
I started a videohelp.com thread TT_VTX.log? previously because at the time
I had my TTTVRC.exe remote control exe running 24 hours a day.
I thought the TTTVRC.exe was dumping those files,
but now I never have TTTVRC.exe running and
somehow something is (still) dumping those files to my
ViDub & VDM directories on 1 (& only 1) of my XP laptops ...
(The "http://" button is not working for me.
In fact only the "QUOTE" & "CODE" buttons are working for me.) |
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| Placio74 |
| Posted: Jan 8 2012, 07:13 PM |
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VideoAudio
Group: Members
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Joined: 24-May 07
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| QUOTE (AEN007 @ Jan 8 2012, 11:28 AM) | ...
Where are "PLUGIN OPTIONS"?
... |
Select Ask for extended options after this dialog option when opening a audio/video file.
Besides DirectShow import driver, which are options in file information window.
| QUOTE (AEN007 @ Jan 8 2012, 11:28 AM) | ... but every re-dub is "lossy" ....
no matter what the bitrate is. Right?
... |
Transcoding using a lossy codec - technically yes. However (sometime), decrease quality may not be noticeable (by human eye).
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VideoAudio.pl - Serwis o technologii wideo & audio |
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| Mr Hangman |
| Posted: Jan 13 2012, 02:27 PM |
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I'm having trouble using the smart rendering feature. Several problems are frustrating me and I could use some help. I'm getting the error: "Cannot initialize smart rendering: No video codec is selected for compression." I'm aware that the same codec as the source file must be selected, but I am still unable to resolve the error. Smart rendering is a fantastic feature and I'm thrilled to see VirtualDub has it, but it sure seems to be making it as hard to use as possible.
First of all, it looks to me to be a poor error message. I do have a video codec selected, but apparently not one it's happy with. If I click Video->Compression and select anything other than "[Uncompressed RGB/YCbCr]" and press OK, then I've selected a codec for compression. Irritating.
The documentation says that certain codecs cannot be smart-rendered. Annoying me once again, it does not say which ones. Can it do H264? If the codec cannot be smart-rendered, what is VirtualDub's error message? I hope it's not the same inaccurate message I'm already getting.
And if only a matching codec works, shouldn't one be automatically selected? Why should I have to dig up the matching one? Some say to check the source file's codec in File->File Information, but the codec is not among the information displayed. For some codecs, it says what the decompressor is, from which the codec can be inferred, but they're not the same thing. Other codecs don't even display that. How can I be sure if I selected the right one or not?
Specifically I'm trying to smart cut an H264 encoded video. In the compression dialog, I select fddshow, then click Configure to select H.264. I don't understand why there are tabs for both the Encoder and Decoder. This is the compression dialog, aren't I here to select the Encoder? Anyway, I choose H.264 on both but the error does not go away. I also tried an MPEG-1 file and had the same problems.
Thanks in advance for any help. |
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| Placio74 |
| Posted: Jan 15 2012, 06:12 PM |
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VideoAudio
Group: Members
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| QUOTE (Mr Hangman @ Jan 13 2012, 04:27 PM) | ...I'm getting the error: "Cannot initialize smart rendering: No video codec is selected for compression." I'm aware that the same codec as the source file must be selected, but I am still unable to resolve the error. Smart rendering is a fantastic feature and I'm thrilled to see VirtualDub has it, but it sure seems to be making it as hard to use as possible.
First of all, it looks to me to be a poor error message. I do have a video codec selected, but apparently not one it's happy with. If I click Video->Compression and select anything other than "[Uncompressed RGB/YCbCr]" and press OK, then I've selected a codec for compression. Irritating. |
Odd...
"Cannot initialize smart rendering: No video codec is selected for compression."
Should be displayed if you do not select a specific codec - so only with uncompressed.
"Cannot initialize smart rendering: The selected video codec is able to compress the source video, but cannot match the same compressed format."
This should be displayed if selected codec is not compatible. Usually if video format is different, but also if codec can not write same FourCC code (DivX write only DX50 - when Xvid can write XVID, DIVX, DX50 and MP4V).
| QUOTE (Mr Hangman @ Jan 13 2012, 04:27 PM) | | ...Can it do H264? |
With x264vfw codec (enabled VirtualDub Hack option may be needed), I think so (worked when I checked).
| QUOTE (Mr Hangman @ Jan 13 2012, 04:27 PM) | | ...If the codec cannot be smart-rendered, what is VirtualDub's error message? |
There is no specific message for that - there is no 'detection' for this.
| QUOTE (Mr Hangman @ Jan 13 2012, 04:27 PM) | | ...I also tried an MPEG-1 file and had the same problems. |
Same?
VirtualDub can't save MPEG-1 to AVI without re-encoding. When smart rendering is used, only a necessary part of the video is transcoded and rest and rest just copied (and VirtualDub can't do this for MPEG-1 and MPEG-2).
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VideoAudio.pl - Serwis o technologii wideo & audio |
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| ale5000 |
| Posted: Jan 15 2012, 06:18 PM |
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| QUOTE (Placio74 @ Jan 15 2012, 07:12 PM) | | QUOTE (Mr Hangman @ Jan 13 2012, 04:27 PM) | | ...I also tried an MPEG-1 file and had the same problems. |
Same?
VirtualDub can't save MPEG-1 to AVI without re-encoding. When smart rendering is used, only a necessary part of the video is transcoded and rest and rest just copied (and VirtualDub can't do this for MPEG-1 and MPEG-2). |
Maybe it can work if MPEG-1/2 video is inside mkv or mp4/mov but I haven't tried.
--------------------
New VirtualDub forum
VirtualDub AIO (All-in-One installer for VirtualDub and plugins)
Codec Toolbox RS (A tool to read/change merit of codecs and many other things)
Input plugins for VirtualDub / ACM codecs / VFW codecs |
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| Placio74 |
| Posted: Jan 15 2012, 07:20 PM |
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VideoAudio
Group: Members
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| QUOTE (ale5000 @ Jan 15 2012, 08:18 PM) | | Maybe it can work if MPEG-1/2 video is inside mkv or mp4/mov but I haven't tried. |
Possible for AVI and MKV with MPEG-1 or MPEG-2 video - ffdshow VfW is required for decoding and encoding (also correct FourCC).
So (slightly different)...
VirtualDub can't save MPEG-1 to AVI without re-encoding when it's imported from MPEG-ES/PS (and when internal decoder is used).
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VideoAudio.pl - Serwis o technologii wideo & audio |
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| ale5000 |
| Posted: Jan 15 2012, 07:27 PM |
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Advanced Member
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Posts: 1114
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| QUOTE (Placio74 @ Jan 15 2012, 08:20 PM) | So (slightly different)...
VirtualDub can't save MPEG-1 to AVI without re-encoding when it's imported from MPEG-ES/PS (and when internal decoder is used). |
It can be remuxed to mkv with MKVToolnix before opening it in VirtualDub.
--------------------
New VirtualDub forum
VirtualDub AIO (All-in-One installer for VirtualDub and plugins)
Codec Toolbox RS (A tool to read/change merit of codecs and many other things)
Input plugins for VirtualDub / ACM codecs / VFW codecs |
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| AEN007 |
| Posted: Jan 16 2012, 08:49 AM |
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Advanced Member
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Posts: 90
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Joined: 10-November 08
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| QUOTE (Placio74 @ Jan 7 2012, 07:40 PM) | | QUOTE (AEN007 @ Jan 7 2012, 01:26 AM) | ...I mean, there is NO WAY to redub a video and
have the output be better than the input ... right?... |
Sometimes it is possible to obtain a relatively 'better' output video -
using some postprocessing filters, for example MSU Smart Deblocking filter. |
MSUSD is great.
I have found (initially) that using MSUSD makes an output bitrate of 333 with the DivX codec set to quality 2
about equal to an output bitrate of 507 with the DivX codec set to quality 7.
So, the processing is faster (q2 v q7) and the output smaller (333 v 507).
The MSUSD filter can be set/used via aviSynth.
It seems MSUSD is crashing my ViDub 1.9.11.
| CODE | LoadVirtualDubPlugin("C:\PortPFs\AVapps\ViDubs\ViDub\plugins\MSUSD.vdf","MSU_Smart_Deblocking", 0)
clip=DirectShowSource("D:\ViD\VnP\GD-19890621abeW.flv", fps=29.970)
clip.Crop(0,4,0,-2).BilinearResize(320,240).ConvertToRGB32.MSU_Smart_Deblocking(1, 1, 1, 1) |
I can load the avs script & work on the file,
but then every time I close ViDub, the ViDub "Oops crash/error" popups.
The first time I tried to do a batch multipass dub,
ViDub crashed after completing the first pass.
I am wondering what is going on ... |
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| AEN007 |
| Posted: Jan 17 2012, 08:18 AM |
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17January2012
1) If I use that avs script "manually" (not batch) -
I load the avs script into ViDub;
I load a vcf file to edit out the dead air & set the audio encoding;
I set ViDub to No Audio;
I set the DivX codec to multipass/1stPass @ 333q2;
I edit the file down to a 2 minute test sample;
I do "Save as AVI".
ViDub does the dub fine.
I then add the external wav file;
I set the DivX codec to multipass/nthPass @ 333q2;
I do "Save as AVI";
ViDub does the dub fine.
When I then EXIT from ViDub, the Oops crash/error popup appears.
2) If I use that avs script in a multipass batch -
the Oops crash/error popup appears when the 2nd pass starts.
3) If I use that avs script in a MODIFIED multipass batch -
I create/use 2 different avs scripts;
The avs for the first pass is»| CODE | DirectShowSource("D:\ViD\VnP\GD-19890621abeW.flv", fps=29.970)
Crop(0,4,0,-2).BilinearResize(320,240) |
The avs for the 2nd/nth pass is from the previous post.
ViDub does the batched 1st pass fine;
ViDub completes the batched 2nd/nth pass fine &
then immediately crashes with the Oops popup ...
So I can now at least batch complete 1 video at a time ...
I am wondering what is going on ... |
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| AEN007 |
| Posted: Jan 17 2012, 04:39 PM |
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Advanced Member
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17January2012
2 related/irrelevant items:
1) When I do multipass dubbing of avs scripts,
I have ViDub set to "Fast recompress",
but using filters requires "Full processing mode".
What should/must the setting be when using the MSUSD filter in an avs script?
2) Color Depth
I have no idea what these settings should be under normal circumstances.
When not doing Fast recompress,
I have been using Autoselect Decompression &
4:2:2 YCbCr (YUY2) Output format
(because I once read somewhere that YUY2 would give the smallest output ...)
What should/must the settings be when using the MSUSD filter in an avs script (with Full processing mode)?
The MSUSD script says "ConvertToRGB32",
so I would guess maybe both De/compress settings should be 32bit RGB (888)?
ViDub crashes the same regardless of how I make the above settings ...
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