VirtualDub2 - Page 80

SeeMoreDigital · 21st March 2025, 13:17

Quote:

Originally Posted by LigH

VirtualDub2 r44282 (release): OK

I can confirm this release does indeed fix Leo 69's issue

Edit: Having a 'variable frame rate' doesn't help. But re-muxing the hevc elementary stream to have a constant frame didn't help either.

LigH · 21st March 2025, 13:21

Quote:

Originally Posted by v0lt

I found a similar issue: https://github.com/mpv-player/mpv/issues/3440

There I read that there are reasons (e.g. VFR, but also High Bit Depths) which may cause wrong seeking. Issue got closed only because "wrong muxing" was blamed. But if an older version works without issues, there seems to be a more compatible fallback technique to determine a valid reference frame?

Leo 69 · 21st March 2025, 15:30

I just wanted to add that variable frame rate doesn't really play a role, I have plenty of videos with CFR which VirtualDub has same issues with (but not with all videos).

v0lt · 21st March 2025, 20:58

I found this ticket - https://trac.ffmpeg.org/ticket/9805.
There is a problem with ffplay, but ffplay works fine for me.
There are links in the ticket, but they do not explain how to solve the problem in applications using ffmpeg.

qyot27 · 21st March 2025, 21:19

Quote:

Originally Posted by LigH

There I read that there are reasons (e.g. VFR, but also High Bit Depths) which may cause wrong seeking. Issue got closed only because "wrong muxing" was blamed. But if an older version works without issues, there seems to be a more compatible fallback technique to determine a valid reference frame?

If it's the sort of 'wrong muxing' I'm thinking of (or at least in the same ballpark), then remuxing yourself using MKVToolNix and then checking if the new file is broken would confirm that.

LigH · 21st March 2025, 22:27

Original sample.mkv was (according to metadata) multiplexed with mkvmerge v90.0.

Remultiplexed with mkvmerge v91.0: same result (works in r44282, fails with any newer avlib).

Remultiplexed with Box4 v3 to MP4: same result (works in r44282, fails with any newer avlib).

v0lt · Today, 18:00

Test build VirtualDub2 v2.3.0.838.
I tried to fix the problem with some HEVC streams.
Hopefully nothing else was broken.

21st March 2025, 15:30	#1583 \| Link
Leo 69 Registered User Join Date: Nov 2004 Posts: 247	I just wanted to add that variable frame rate doesn't really play a role, I have plenty of videos with CFR which VirtualDub has same issues with (but not with all videos). Last edited by Leo 69; 21st March 2025 at 15:43.

21st March 2025, 20:58	#1584 \| Link
v0lt Registered User Join Date: Dec 2008 Posts: 2,187	I found this ticket - https://trac.ffmpeg.org/ticket/9805. There is a problem with ffplay, but ffplay works fine for me. There are links in the ticket, but they do not explain how to solve the problem in applications using ffmpeg. __________________ MPC-BE 1.8.3 and Nightly builds \| VideoRenderer \| ImageSource \| ScriptSource \| BassAudioSource

21st March 2025, 22:27	#1586 \| Link
LigH German doom9/Gleitz SuMo Join Date: Oct 2001 Location: Germany, rural Altmark Posts: 7,199	Original sample.mkv was (according to metadata) multiplexed with mkvmerge v90.0. Remultiplexed with mkvmerge v91.0: same result (works in r44282, fails with any newer avlib). Remultiplexed with Box4 v3 to MP4: same result (works in r44282, fails with any newer avlib). __________________ New German Gleitz board MediaFire: x264 \| x265 \| VPx \| AOM \| Xvid Last edited by LigH; 21st March 2025 at 22:31.

Today, 18:00	#1587 \| Link
v0lt Registered User Join Date: Dec 2008 Posts: 2,187	Test build VirtualDub2 v2.3.0.838. I tried to fix the problem with some HEVC streams. Hopefully nothing else was broken. __________________ MPC-BE 1.8.3 and Nightly builds \| VideoRenderer \| ImageSource \| ScriptSource \| BassAudioSource

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