Topic: Anyone made some use of SVPcore to transcode videos?

Been trying it out. It works well most of the time, apart from playback issues on specific parts of a video. Everytime an OP/ED of a anime starts (in my one tested episode) the playback kinda stops. Doesn't do anything but stop, and you can only get past it by skipping it a bit. And then the sound is gone, until the OP ends, at the exact moment it switches back to the episode title. and it's fine until the ED is about to start. I send a report/feedback about it, but wanted to hear if someone else encountered the same here.

Another issue is that the subtitles are transcoded, and thus hardcoded with the video, as well as a subtitle after transcoding, which seems a bit overkill and removes the ability to switch subtitles or switch them off. That should go away too, or at the very least be an option. And i don't know how to turn it off, since it's on by default in the basic mode.

I do see great potential, as someone that has had their troubles with making 60 fps videso before, but these issues are small ones that could be ironed out, hopefully. Anyways, if someones used it, i'd love to hear some feedback that you have!

Re: Anyone made some use of SVPcore to transcode videos?

> Everytime an OP/ED of a anime starts (in my one tested episode) the playback kinda stops.

1. If different parts of the video have different frame rate values then it's not good - it will be broken in an unknown way after transcoding.
2. Try to re-mux the video manually with MKVToolNix - will it help?

Re: Anyone made some use of SVPcore to transcode videos?

Chainik wrote:

> Everytime an OP/ED of a anime starts (in my one tested episode) the playback kinda stops.

1. If different parts of the video have different frame rate values then it's not good - it will be broken in an unknown way after transcoding.
2. Try to re-mux the video manually with MKVToolNix - will it help?

Thanks for the mention, but there's only one video stream/file, and last time i watched something with a variable framerate, SVP made sure to mention it during playback. I have not encountered this with the current files at all, with regular SVP usage. Looking at the media info in MPC-HC it also claims framerate mode is constant, and at 23.976 (24000/1001) fps. So that's a bit confusing. Also, that stops like that under only specific parts of the video has me a bit in awe. The fact that only OP/ED is broken is pretty new to me in terms of video conversion and how it goes back to normal after those parts...

There is, however two audio files that are just the same as well as a .ass subtitle file in the mkv, one of those could be the issue. Especially since the audio tracks both are the exact same as far as i noticed, but one is about double the size of the other.

Re: Anyone made some use of SVPcore to transcode videos?

I'm not an expert in anime, but I heard that OP/ED are often encoded with different frame rate (constant, not variable, but different).

There's an unknown muxing problem with some mkv's now. The resulting mkv generated with ffmpeg is somehow broken  - this's why I asked about manual remuxing in MKVToolNix.

Re: Anyone made some use of SVPcore to transcode videos?

Chainik wrote:

I'm not an expert in anime, but I heard that OP/ED are often encoded with different frame rate (constant, not variable, but different).

There's an unknown muxing problem with some mkv's now. The resulting mkv generated with ffmpeg is somehow broken  - this's why I asked about manual remuxing in MKVToolNix.


Remuxing, just opening the transcoded file in mkvtoolnix and then remuxing it, it works normally so far. So that's great! Thanks!

I'm wondering though, since the mkv only contains one video stream, how can some parts of it have a different framerate, when it's listed as constant? Or rather, how can i go about it to find out if that's the case. ffmpeg and MPC-HC doesn't seem to show that anywhere.

  • MAG79
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Re: Anyone made some use of SVPcore to transcode videos?

I used these tools: mkv2vfr and mp4dump
How to recognize vfr content (mkv/mp4)

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Re: Anyone made some use of SVPcore to transcode videos?

>  playback issues on specific parts of a video
>  the subtitles are transcoded, and thus hardcoded with the video

both fixed in rev.126