VideoHelp Forum - Restoration https://forum.videohelp.com/ Video and audio restoration. The process of improving the quality of your audio and video whether by means of hardware or software. en Mon, 07 Sep 2026 12:21:58 GMT vBulletin 60 https://forum.videohelp.com/images/misc/rss.png VideoHelp Forum - Restoration https://forum.videohelp.com/ Luma De-Flicker Options https://forum.videohelp.com/threads/421085-Luma-De-Flicker-Options?goto=newpost Thu, 03 Sep 2026 19:02:32 GMT Greetings all - Could anyone offer software suggestions on how to tackle evening out the flicker (if that is the proper term) shown in the attached sample? If "flicker" is not the proper term, I apologize, but would most appreciate clarification and a point in the right direction.

Thanks so much!!

Joe
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]]> Restoration Eluthingol https://forum.videohelp.com/threads/421085-Luma-De-Flicker-Options Horizontal Chroma Shift on Every Other Frame Post De-interlace https://forum.videohelp.com/threads/421028-Horizontal-Chroma-Shift-on-Every-Other-Frame-Post-De-interlace?goto=newpost Sat, 22 Aug 2026 20:24:28 GMT This one has me a bit stumped. No combination of ChromaShiftSP on the individual fields fix the horizontal chroma shift on this video (originally Hi8 camcorder). The deinterlaced sample just has QTGMC at its default settings to really heighten the shifting (pay attention to the bright red... This one has me a bit stumped. No combination of ChromaShiftSP on the individual fields fix the horizontal chroma shift on this video (originally Hi8 camcorder). The deinterlaced sample just has QTGMC at its default settings to really heighten the shifting (pay attention to the bright red containers...you might have to play the footage frame-by-frame to really see it). Also attached is a lossless sample without any processing.
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]]> Restoration cbehr91 https://forum.videohelp.com/threads/421028-Horizontal-Chroma-Shift-on-Every-Other-Frame-Post-De-interlace Need help : Constant audio desync after upload (perfect locally) https://forum.videohelp.com/threads/421025-Need-help-Constant-audio-desync-after-upload-(perfect-locally)?goto=newpost Fri, 21 Aug 2026 21:47:06 GMT Hello,I’m dealing with a very stubborn audio/video sync issue. Symptoms: * The video is perfectly in sync locally (VLC (https://www.videohelp.com/software/VLC-media-player), PC players, YouTube on desktop). * After uploading (YouTube + other platforms), a constant offset appears (audio is... Hello,I’m dealing with a very stubborn audio/video sync issue.

Symptoms:
  • The video is perfectly in sync locally (VLC, PC players, YouTube on desktop).
  • After uploading (YouTube + other platforms), a constant offset appears (audio is delayed).
  • The desync is especially noticeable on mobile and on files downloaded from the platforms.
  • It is not progressive drift — it’s a fixed offset.

What I’ve already tried without success:
  • Spectral analysis (Spek, Adobe Audition, iZotope RX Spectral Recovery) → cutoff around 12,141 Hz
  • Conversions forcing the original sample rate to 24,000 Hz, 22,050 Hz, 22,500 Hz, then high-quality resampling to 48 kHz (SoX high precision)
  • Forcing Constant Frame Rate
  • Cleaning timestamps (asetrate, asetpts, video_track_timescale, etc.)
  • Different H.264 profiles (baseline, main…)
  • Re-capturing audio via OBS loopback at 48 kHz
  • Mono versions

I’ve uploaded dozens of other videos without ever encountering this problem, so I believe the cause lies in this particular source (history of conversions + very limited bandwidth). Has anyone encountered a similar case and found a definitive fix on the source file side?
Thank you in advance. ]]> Restoration -Tetsuo- https://forum.videohelp.com/threads/421025-Need-help-Constant-audio-desync-after-upload-(perfect-locally) Need help removing heavy analog artifacts from this source https://forum.videohelp.com/threads/421018-Need-help-removing-heavy-analog-artifacts-from-this-source?goto=newpost Thu, 20 Aug 2026 12:28:30 GMT Hello! I'm trying to restore this source and I'm struggling trying to remove the rainbow & dotcrawl artifacts (a.k.a analog artifacts)
Image
[Attachment 93507 - Click to enlarge]
Can anyone help me out here? thank you!
https://drive.google.com/file/d/1Pr9y43TyLOMFLyy_bHd1vzI4MyDsGJY3/view?usp=sharing ]]> Restoration themon-master https://forum.videohelp.com/threads/421018-Need-help-removing-heavy-analog-artifacts-from-this-source Porting ChubbyRain2 To Vapoursynth https://forum.videohelp.com/threads/421016-Porting-ChubbyRain2-To-Vapoursynth?goto=newpost Thu, 20 Aug 2026 03:24:36 GMT Apologies if this is wrong thread or I sound like I'm begging here but I'm stumped on how to handle this since I have no python nor real coding experience.

Is there anybody out there that would know how to port ChubbyRain2 to Vapoursynth? Or at the very least, know a way to load the avsi file into vapoursynth? I only know how to load the required dll files ChubbyRain needs to use.

Alas this isn't a dll, otherwise I would have known what to do. DeCross works great as a Derainbow filter but it doesn't catch them all, I'd rather use it and ChubbyRain2 to deal with rainbows while not sucking out/changing the original colors of a video which other filters like regular Derainbow and RainbowSmooth do.


Thanks. ]]> Restoration The 14th Doctor https://forum.videohelp.com/threads/421016-Porting-ChubbyRain2-To-Vapoursynth Need help de-chroma bleeding https://forum.videohelp.com/threads/421014-Need-help-de-chroma-bleeding?goto=newpost Thu, 20 Aug 2026 02:28:54 GMT I got a tape transfer that has some chroma bleeding on it, and I'm looking to remove it, not sure what the best way to do so is.
Here's a sample. Sadly that's the best quality I have it in, not sure what it was put through to compress it as it wasn't my transfer and I don't think I can get a better one done :/ ]]> Restoration tapiocattundra https://forum.videohelp.com/threads/421014-Need-help-de-chroma-bleeding <![CDATA[Reversing PAL>NTSC conversion]]> https://forum.videohelp.com/threads/421011-Reversing-PAL-NTSC-conversion?goto=newpost Wed, 19 Aug 2026 12:33:56 GMT DVD) that has been converted from PAL to NTSC at some point in the signal chain and has a weird way of achieving it, it looks temporally blurry (compared to an incomplete PAL Betacam source with way more motion clarity, ruling out the cameras used) or blended...]]> I have a concert recording(VHS>DVD) that has been converted from PAL to NTSC at some point in the signal chain and has a weird way of achieving it, it looks temporally blurry (compared to an incomplete PAL Betacam source with way more motion clarity, ruling out the cameras used) or blended together, I've experimented with srestore a little bit but couldn't get decent results
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]]> Restoration Mizo https://forum.videohelp.com/threads/421011-Reversing-PAL-NTSC-conversion How to adjust the luminance of a specific vertical section of a frame? https://forum.videohelp.com/threads/420999-How-to-adjust-the-luminance-of-a-specific-vertical-section-of-a-frame?goto=newpost Sun, 16 Aug 2026 17:20:31 GMT Hi, Does anyone know if there is an existing function for Avisynth (https://www.videohelp.com/software/Avisynth) that can be used to adjust the brightness of a specific vertical section of the frame? One option that came to mind is to try using ColorYUV(off_y = XXX) on a specific part of the... Hi,

Does anyone know if there is an existing function for Avisynth that can be used to adjust the brightness of a specific vertical section of the frame?

One option that came to mind is to try using ColorYUV(off_y = XXX) on a specific part of the frame, but perhaps there is already a ready-made implementation for this?

I’ve attached a screenshot and a short AVI clip showing the problem I’m trying to fix.

Image
[Attachment 93471 - Click to enlarge]
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]]> Restoration Rolletus https://forum.videohelp.com/threads/420999-How-to-adjust-the-luminance-of-a-specific-vertical-section-of-a-frame