workflow and supported codecs

Workflow for creating files playable at our theatre using only cross-platform tools.

1. ffmpeg to create mp4 file if input is frame sequence - as in this post,
   ffmpeg -r 30 -f image2 -i "Our-frame_%06d.png" -vcodec libx264 -crf 15  -pix_fmt yuv420p Our-movie-4k-frames.mp4
   
   
2. OCVWarp to create warped file. Fourcc of avc1 results in x264 video, good quality.
   
   
3. Avidemux to edit the warped file, move the credits to the beginning and speed up credits. Also overlay Hindi / Telugu title text as graphics using the logo filter.
    
4. To note: Firestick 4K needs FAT32 formatted disk, which has a 4 GB file size limitation. So, re-encoding files with x265 (HEVC) using the options in the Configure button to choose file-size based codec quality. This takes around 8 hours to encode a half-hour 4K 30 fps video on an i5 laptop!
   
   
5. Similarly, the older BluRay player needs to have 1080p encoded with XVID fourcc. x263, I guess. 

Upcoming - perhaps try AV1 codec?

https://trac.ffmpeg.org/wiki/Encode/AV1