just ANAL + gif

https://shahvani.com/forum/topic/just-ANAL-gif [transcode] Command '['ffmpeg', '-y', '-ss', '2', '-i', '/tmp/hls-worker-lohjb_9g/src.mp4', '-frames:v', '1', '-update', '1', '-q:v', '3', '/tmp/hls-worker-lohjb_9g/out/poster.jpg']' returned non-zero exit status 234.