Opening MTS with virtualdub doesn't go smooth

[Bencuri]

I am trying to open an MTS file in Virtualdub with ffmpegsource2, and the file loads okay, the preview starts from the first frame, but when I press forwind, it jumps about 10 frames at once on the second frame position, and when I go back to the first frame, it never jumps back to the first one, but displays the 10th frame or so as the first one. And from that point on when I forwind, sometimes there are more big jumps, too as I advance. When I export frames as jpeg, it doesn't start on the real first frame either, but advances a bit and start saving like that. How to overcome this issue?

[poisondeathray]

Is that vdub classic with the ffmpeg input driver ?

did you try vdub2 ?

Or did you mean an avs script with ffmpegsource2 ?

[Bencuri]

VirtualDub-1.10.4

https://github.com/FFMS/ffms2/releases

I only copied the .dll and the ffmpeg avs to the Avisynth Plugin directory, can that be the problem???

[poisondeathray]

What are you doing exactly ? Are you using a script ? If yes, post your script

Or are you opening the mts directly in vdub ? If so, then use vdub2 instead

[LigH.de]

Some time ago, there used to be problems reading (especially interlaced AVC) video from TransportStream containers with multi-threading ... not sure how certainly they got fixed. Limiting decoding threads to 1 in the function call may help.

[Bencuri]

This is the script:

FFmpegSource2("path")
AssumeTFF()

[poisondeathray]

Try the threads=1 setting , or lsmash, or another ffms2 version (certain versions may work better).

FFVideoSource("video.mts", threads=1)

lsmash

LWLibavVideoSource("video.mts")

Other workarounds include remuxing into a mkv first, then ffms2. Or last resort DirectShowSource or a derivative like dss2mod

If you have a nvidia card, dgsource() . It's not free, but it's the most reliable

[Bencuri]

LWLibavVideoSource this is what opens the video correctly. Thanks!