D2V Witch: cross-platform D2V creator

[Blue_MiSfit]

Just out of curiosity, what's the use case for d2v files these days? ffvideosource seems to open all MPEG-2 variants I've tried.

[ChaosKing]

ffms2 and mpeg are not very good friends https://forum.doom9.org/showthread.php?t=176231

[Jukus]

Sometimes can find mpeg2 video, when using d2v the wrong index is obtained, but with ffms2 the correct one.

[jackoneill]

Originally Posted by Blue_MiSfit

Just out of curiosity, what's the use case for d2v files these days? ffvideosource seems to open all MPEG-2 variants I've tried.

People still have DVDs to decode, apparently. You need something that treats the collection of VOBs as a single file, otherwise you lose some frames (and synchronisation, probably) if you open them individually with ffms2.

Originally Posted by Jukus

Sometimes can find mpeg2 video, when using d2v the wrong index is obtained, but with ffms2 the correct one.

If you were using D2V Witch v3, that might have been due to one of the bugs fixed in v4. If the index is still wrong with v4, you should report it.

[stax76]

For PAL DVDs which are typically progressive the best route was always MakeMKV and then open it with ffms2 or L-Smash, this route was extremely reliable, probably it still is, other older routes often failed by causing issues, for instance with subtitle sync, there were still ways but not as simple as using MakeMKV.

[Jukus]

Originally Posted by jackoneill

If you were using D2V Witch v3, that might have been due to one of the bugs fixed in v4. If the index is still wrong with v4, you should report it.

A distinctive feature of these videos is that mediainfo shows that the bottom field first, but in fact the first is top. If need a sample, now I do not have it.

Personally, I always use d2v in the first place, otherwise there may be problems with skipping frames and the wrong frame order. Only if d2v gives the wrong result, then I use ffms2.

[Selur]

Just out of curiosity, what's the use case for d2v files these days?

opening DVDs is the main usage for it here.

[stax76]

Thank you HolyWu!

[Jukus]

Originally Posted by jackoneill

If you were using D2V Witch v3, that might have been due to one of the bugs fixed in v4. If the index is still wrong with v4, you should report it.

If do remux to m2v using ffmpeg, and there will be such errors in the log, then d2witch will not be able to make the correct index for this video.

...
[mpeg2video @ 0x55bdad62db80] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 94245 >= 94243                                                                         
[mpeg2video @ 0x55bdad62db80] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 94245 >= 94244                                                                         
[mpeg2video @ 0x55bdad62db80] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 94245 >= 94245                                                                         
    Last message repeated 1 times
[mpeg2video @ 0x55bdad62db80] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 94248 >= 94246
[mpeg2video @ 0x55bdad62db80] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 94248 >= 94247                                                                         
[mpeg2video @ 0x55bdad62db80] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 94248 >= 94248                                                                         
    Last message repeated 1 times
[mpeg2video @ 0x55bdad62db80] pts (94249) < dts (94250) in stream 0
[mpeg2video @ 0x55bdad62db80] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 94249 >= 94249                                                                         
[mpeg2video @ 0x55bdad62db80] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 94252 >= 94250
...

[Jukus]

v5 was released, I checked, now everything is indexed correctly
Still support mkv for convenience

[jackoneill]

Originally Posted by Jukus

v5 was released, I checked, now everything is indexed correctly

Even the files with these errors from ffmpeg?

[mpeg2video @ 0x55bdad62db80] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 94245 >= 94243

[Jukus]

Originally Posted by jackoneill

Even the files with these errors from ffmpeg?

[mpeg2video @ 0x55bdad62db80] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 94245 >= 94243

Yes, now these files are indexed correctly.