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Old 4th April 2023, 04:38   #1161  |  Link
v0lt
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Quote:
Originally Posted by LigH View Post
I just tried to convert a clip encoded with AV1 and Opus. File Information displays the details. But the audio stream appears to be silent.
Yes. There is a problem with Opus audio decoding.
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Old 6th April 2023, 16:42   #1162  |  Link
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Quote:
Originally Posted by v0lt View Post
Thanks for this upgrade.

But with this version I get this issue (using caching input driver): mpeg-2 in .mkv doesn't seek; it doesn't see I/K-frames (shift + right/left arrow goes to last/first frame only).

No problem with last official Virtualdub2 (2020) and no problem with h.264/MKV.
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Old 8th April 2023, 03:36   #1163  |  Link
LigH
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I found another issue with your test build:

On the occasion of the death of the most thanked Flat Earther, Bob Knodel, I downloaded a video from YouTube using yt-dlp, to cut out the "15 degrees per hour drift" meme. But the selected start and end positions of the opened clip were not reliable, neither while exporting it to a separate MP4 file, nor while navigating and playing it in the timeline editor. The audio was async, and the start moved randomly.
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Old 22nd April 2023, 19:24   #1164  |  Link
v0lt
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VirtualDub2_x64_ffmpeg6.0_test6.7z
I seem to have fixed the problem with OPUS decoding.
It's not clear to me how to solve other problems, the code is very confusing.
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Old 25th April 2023, 21:01   #1165  |  Link
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Quote:
Originally Posted by jpsdr View Post
Yes i have. I can put the file on an ftp server and PM you IP & log information if you want.
Any chance for me to have x64 of DShowInputDriver.vdplugin?
Not needed now, but want to do some comparisons with Caching Input driver. Thanks!
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Old 26th April 2023, 03:53   #1166  |  Link
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Quote:
Originally Posted by poisondeathray View Post
Your screenshot for x265vfw shows DAR width, height, not SAR . Try 16 and 9 .
If the the extra commandline box works, you can enter --sar x:y there instead
Just tested, DAR setting is ignored in x265vfw, but ntsc: "--sar 10:11" or for PAL: "--sar 59:54" will generate 4:3 hevc video.
For 16:9 ntsc/pal use: --sar 40:33 / --sar 16:11
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Old 8th May 2023, 09:30   #1167  |  Link
v0lt
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Quote:
Originally Posted by isidroco View Post
Any chance for me to have x64 of DShowInputDriver.vdplugin?
http://www.virtualdub.org/beta/DShow...river-0.93.zip
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Old 23rd May 2023, 13:32   #1168  |  Link
nji
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Screen Capture: Strange audio desync

I need to make a capture of a coming broadcasted video
and so tried this function of VD2 for the first time.
Doing so I encountered problems, maybe someone can help?

At the beginning the audio is about 1s to early.
In between the audio sounds "strangely wrong"/ swaying.
At the end (abt. 2 min) the audio is much to quick,
the voices sound like Donald Duck, still the audio
sync seems to lessen/ vanish (in opposite to what the
statistic pane says).

I enclose the statistic pan at the end of the video.
(At the beginning it shows a sync error of abt 10ms).

I used lagarith for video compr., and PCM for audio.

My settings (when different from default):
Video - Source:
Panning area = top level client area, Acc. mode = GDI
Video - Set Custom Format = 1280 x 768
Audio - Default Output Loopback (Core Audio)
Capture - Capture Settings: Framerate = 50
(Strange: The statistic pane says 27.3 fps, and the
captured movie is abt. 50 fps; checked framewise: a dupe abt. every 10th)
Capture - Timing: Automatical disable ... (no matter how it's set).

What might be going on here?
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Last edited by nji; 23rd May 2023 at 13:45.
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Old 23rd May 2023, 22:38   #1169  |  Link
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Thanks!

Quote:
Originally Posted by nji View Post
Screen Capture: Strange audio desync
Hi nji. Which is the capture card you are using?
Please try these Capture Timing Options:
[x] Drop frames..; [x] Insert null...; Null limit: 10; [x] Sync audio to video...; [x] Correct video timing...; [x] Automatic; Number of audio blocks:30; [x] Force audio clock...

Also try first using Capture Settings: Frame Rate=25 (you may try 50fps later after succeeding with 25).

On Lagarith: Mode YV12; [x] Use Multithreading. Uncheck the rest (Null frames may cause desynch on some programs). YV12 is smaller.
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Old 24th May 2023, 10:38   #1170  |  Link
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@isidroco:
Thank you.

Capture card: For screen capture there is no need for a capture card - I don't have any.

Settings: Timing: The settings you suggest are the default ones. With the exception of "Automatic".
That's what I tried - without success.

But meanwhile I tried disabling Resync mode, "Correct" and "Automatic". ==> Audio in sync from start to end!!
So there seems to be a kind of bug (?) in VD2?

Moreover there remains the question about fps (see my first post above).
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Old 28th May 2023, 09:55   #1171  |  Link
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AAC with VBR?

Up to now I mostly used mp4 container for (AVC1, AAC) to have good compatibility.
(Good choice?).
Recently I noticed that AAC in VD2 offers only CBR mode, while most prof movies use VBR mode.
So my (second) question:
Should I use VBR, and how to do that?
(I suspect I need an external codec for it?)
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Old 28th May 2023, 11:43   #1172  |  Link
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No idea if relevant but,
There were always problems in VDub with mp3 VBR,
perhaps problems with *any* VBR is an AVI issue. [EDIT: Or VDub issue]
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Old 31st May 2023, 16:27   #1173  |  Link
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Quote:
Originally Posted by nji View Post
...
(Strange: The statistic pane says 27.3 fps, and the
captured movie is abt. 50 fps; ...
I think the key is there, VDub thinks video is 50fps, but it's being captured at 27.3. I just made a test (with defaults settings as shown before), and with 50fps statistics was also 50 A/V was on synch. Maybe your system has a bottleneck that prevents you to reach that fps. Please use VirtualDub64 which is a lot faster. And try slower FPS first.
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Old 31st May 2023, 16:29   #1174  |  Link
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Quote:
Originally Posted by nji View Post
Should I use VBR, and how to do that?
(I suspect I need an external codec for it?)
Learnt the hard way: Never use VBR audio with VDub.
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Old 1st June 2023, 09:06   #1175  |  Link
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Thank you for your hints!
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Old 19th June 2023, 13:32   #1176  |  Link
LigH
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Today I wanted to open an old AVI file with 16 kHz stereo MP3 audio through AviSynth+. VirtualDub2 build 44282 does it. VirtualDub2_x64_ffmpeg6.0_test6 instead:

---------------------------
File open error
---------------------------
FFMPEG: Unsupported channel layout.
---------------------------
OK
---------------------------

I also tried to export it as WAV, 16 bit stereo, 44100 Hz, loading it separately via LwLibavAudioSource and multiplexing it using AudioDub: same issue.
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Old 19th June 2023, 14:13   #1177  |  Link
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Quote:
Originally Posted by LigH View Post
I also tried to export it as WAV, 16 bit stereo, 44100 Hz, loading it separately via LwLibavAudioSource and multiplexing it using AudioDub: same issue.
Have you tried using good old fashioned AVIMux GUI?
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Old 19th June 2023, 16:30   #1178  |  Link
LigH
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Ehm, I passed the material through AviSynth+, that failed. Both with audio out of an AVI file and with separate audio from WAVSource().AudioDub().
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Old 22nd June 2023, 18:42   #1179  |  Link
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Quote:
Originally Posted by LigH View Post
Ehm, I passed the material through AviSynth+, that failed. Both with audio out of an AVI file and with separate audio from WAVSource().AudioDub().
Try opening the video with VDub2, and File, Save Audio to a WAV file. Try that .WAV in AviSynth.
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Old 23rd June 2023, 21:37   #1180  |  Link
LigH
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I tested a little more and discovered:

The basic builds of VirtualDub2 (both 32 and 64 bit) usually offer the "Caching input driver" when opening an AVI file but immediately switch to the internal "AVIFile/AviSynth input driver" when I select an AVS file.

The test6 build of VirtualDub2 also offers the "Caching input driver" when opening an AVI file; but when I select an AVS file in the directory listing of the File - Open dialog, it utilises my harddisk heavily for a dozen of seconds, then does not automatically switch to "AVIFile/AviSynth input driver". When I try to open the AviSynth script file with the "Caching input driver", it fails complaining "FFMPEG: Unsupported channel layout."; but when I manually switch to the "AVIFile/AviSynth input driver", the script opens.
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