Hi, While working with FFMPEG's prores encoder and trying to verify its validity in creating files that are compliant with a certain set of specifications, I seem to have come to an impasse.
I've managed to resolve most issues that our automated tests have issues with except the message that the video track has a vendor string of "FFMP" instead of "appl". Digging deeper with the help of ffprobe, I can confirm that that is in fact the case when I go into probe->streams->0/video stream->tags->vendor_id = "FFMP" Having to already spoof the encoder using -metadata encoder="Apple ProRes 422 HQ" I figured it was as simple as telling ffmpeg to set the -metadata:s:v:0 vendor_id=appl When trying to encode FFMPEG also tells me that the output file will have the metadata vendor_id=appl Output #0, mov, to 'out.mov': Metadata: major_brand : qt minor_version : 537199360 compatible_brands: qt vendor_id : appl encoder : Lavf58.76.100 Stream #0:0(eng): Video: prores (HQ) (apch / 0x68637061), yuv422p10le(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 0.04 fps, 12800 tbn (default) Metadata: creation_time : 2020-12-21T13:20:40.000000Z handler_name : Apple Video Media Handler vendor_id : appl timecode : 00:00:00:00 encoder : Apple ProRes 422 HQ Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 5.1, s16, 4608 kb/s (default) Metadata: creation_time : 2020-12-21T13:20:40.000000Z handler_name : Apple Sound Media Handler vendor_id : timecode : 00:00:00:00 encoder : Lavc58.134.100 pcm_s16le Stream #0:2(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default) Metadata: creation_time : 2020-12-21T13:20:40.000000Z handler_name : Apple Sound Media Handler vendor_id : timecode : 00:00:00:00 encoder : Lavc58.134.100 pcm_s16le The full command I use is ffmpeg -i src.mov -map 0:0 -map 0:1 -map 0:2 -c:a:0 pcm_s16le -disposition:a:0 default -c:a:1 pcm_s16le -disposition:a:1 default -disposition:d:0 default -c:v prores -profile:v 3 -aspect 16:9 -pix_fmt yuv422p10le -movflags +write_colr -vendor apl0 -metadata:s:v:0 encoder="Apple ProRes 422 HQ" -metadata "vendor_id=appl" -color_primaries bt709 -color_trc bt709 -colorspace bt709 -trellis 0 -subq 7 -me_range 16 -b_strategy 1 -sws_flags fast_bilinear -sc_threshold 40 -keyint_min 23 -g 240 -qmin 3 -qmax 51 -copyts -y out.mov When trying to check after writing using ffprobe again, the vendor_id remains as FFMP though. Am I doing something wrong here? Can FFMPEG not overwrite the vendor_id? If that is the case, is there a specific reason for it? - Marcel _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".