Stinger dont work

[DarKat]

I have created a movie file. On the left i have the stinger video, and on the right "the mask". When i selected 'use a track matte', and 'same file, side-by-side', dont work the opacity (or mask), only show the stinger video. Why?

I attach the video:

4k_square_shape_transition_pack_2_5.mp4

This is "4k_square_shape_transition_pack_2_5.mp4" by DarKat on Vimeo, the home for high quality videos and the people who love them.

vimeo.com

 

[Totana]

I am having the exact same issue... Have tried some stock ones and they work fine but when I create my own using the same methods it doesn't work.

 

[Suslik V]

Alpha channel should cover the left part of the video.
The track matte's part of the alpha channel will be ignored.

Example of the video+alpha into one video_with_alpha in qtrle format with FFmpeg (qtrle is fast but making large files):

ffmpeg -i "C:/Temp/stinger_and_track_matte.mp4" -vf "movie='C\:/Temp/stinger_alpha.mp4'[a];[in][a]alphamerge" -c:v qtrle "C:/Temp/stinger_output.mov"

the output file has alpha channel and should work OK. Track matte part only defines cross-fade between scene "A" and "B" (not transparency!), so if stinger part has no alpha channel - the stinger part of the video will play full screen and will cover any cross-fade that will be in the background.

 

[Totana]

Alpha channel should cover the left part of the video.
The track matte's part of the alpha channel will be ignored.

Example of the video+alpha into one video_with_alpha in qtrle format with FFmpeg (qtrle is fast but making large files):

ffmpeg -i "C:/Temp/stinger_and_track_matte.mp4" -vf "movie='C\:/Temp/stinger_alpha.mp4'[a];[in][a]alphamerge" -c:v qtrle "C:/Temp/stinger_output.mov"

the output file has alpha channel and should work OK. Track matte part only defines cross-fade between scene "A" and "B" (not transparency!), so if stinger part has no alpha channel - the stinger part of the video will play full screen and will cover any cross-fade that will be in the background.

My existing video has alpha (even shows when I preview without matte track ticked, the preview splits and shows with alpha on the left but when I tick the box its like I have just uploaded the video on the left and not the side by side) and I have no idea how to do what you have just outlined (sorry for my ignorance, I am still learning).

 

[Suslik V]

I can only add example of simple stinger+track_matte 1 sec long (that was made with the FFmpeg, look for the details above):

Attachment: ~29KB to download.
CRC of the .7z archive, MD5:60516A29F138A91B757134E885E5E319
(Edit: file is for example only, I mistakenly made the stinger 3 pixels wider, so it spilled a bit into the track matte in the first/last frames)
( Edit 2: newer example is in this post: https://obsproject.com/forum/threads/stinger-transition-point-not-working.171664/post-632504 )