Transcode wrote to {id}.mp4.tmp for atomic publish, but ffmpeg picks
the muxer from the output filename and rejected .tmp with Unable to
choose an output format. Add -f mp4 so the temp name is just storage
scratch, not a format hint.
Transcode wrote to {id}.mp4.tmp for atomic publish, but ffmpeg picks
the muxer from the output filename and rejected .tmp with Unable to
choose an output format. Add -f mp4 so the temp name is just storage
scratch, not a format hint.