[Feature Request] MKV attachment support to save frame as cover.jpg

[cyzs233]

I noticed after export segment, lossless-cut deleted the attachment "cover.jpg" that I put in the original file. But having a custom thumbnail helps while browsing a specific video within a folder. And if you're trying to put a cover.jpg after exportation, you'll need to refresh the thumbnail cache in order to view your changes, which is not a user-friendly task.
Suggestion:

• option to choose a file from file explorer as cover.jpg/cover.png
• option to select a frame from the imported video as cover.jpg/cover.png
• option to keep/discard original cover art within the imported video.

[mifi]

Could you go to the tracks panel and enable the mjpeg track?
I believe this could be related to #308
To reproduce this I found a normal mp4 file and then I did like this: https://superuser.com/questions/1544737/how-to-embed-cover-art-into-mp4-without-errors
When I enable the mpjeg track, it does keep the cover art.

[mifi]

As for adding a custom cover art, I thought this would just work by drag-dropping a jpeg file onto losslesscut with a media file already opened, but it also needs this extra flag -disposition:X attached_pic, like this:

ffmpeg -i 'issue-673-embedded-cover-art.mp4' -i 'cover.jpg' -c copy -map '0:0' -map '0:1' -map '1:0' -disposition:2 attached_pic -map_metadata 0 -f mp4 -y 'out.mp4'

[mifi]

I have added the option to change disposition per stream, so in the next version it can be used to add cover art.

First drag the image into llc, then:

[cyzs233]

Thanks for your hard works, the new UI is pretty cool😀. @mifi

• First, Is the new disposition flag also works on .mkv files? I forget to mention the format in title, updated.

To reproduce this I found a normal mp4 file and then I did like this: https://superuser.com/questions/1544737/how-to-embed-cover-art-into-mp4-without-errors
When I enable the mpjeg track, it does keep the cover art.

• Second, I tried to enable mjpeg tracks on a .mkv file, It does save the mjpeg files, but It doesn't get treated as attachments anymore. Same result if you drop&drop a .png file onto lossless cut.
  As demonstrated in the following gif: The first video is the original with attachment cover art correctly displayed , the second video is a fragment of the same vod using lossless cut with all 4 mjpeg tracks selected.

Dementration gif

[mifi]

• First, Is the new disposition flag also works on .mkv files? I forget to mention the format in title, updated.

it maps directly to the ffmpeg disposition feature so I believe it should work on mkv too.

• As demonstrated in the following gif: The first video is the original with attachment cover art correctly displayed , the second video is a fragment of the same vod using lossless cut with all 4 mjpeg tracks selected.

maybe there is something missing somewhere. So it works with mp4 but not mkv?

[rchndrsn]

This page https://github.com/mifi/lossless-cut speaks of a use case that enables "Attach cover art to videos". But I cannot find how to do this, or any tutorials about it. Is it real? My version 3.39 refuses to export any png or mjpeg tracks at all. Is really possible an if so, please point me to instructions. This inquiry is regarding mp4 files

[mifi]

This page https://github.com/mifi/lossless-cut speaks of a use case that enables "Attach cover art to videos". But I cannot find how to do this, or any tutorials about it. Is it real? My version 3.39 refuses to export any png or mjpeg tracks at all. Is really possible an if so, please point me to instructions. This inquiry is regarding mp4 files

Did you see my comment above? #673 (comment)

I assume you mean that you want set a separate JPG file as a cover art of a video

[mifi]

Closing due to lack of response