It is possible to use the open-source ffmpeg to transcode XDCAM-EX files to other formats, such as DNxHD.Information from http://www.dvinfo.net/forum/sony-xdcam-ex-cinealta/112018-mfx-details-compatibility-what-about-ffmpeg.html as of 2010-12-23:
- ffmpeg -i input.mp4 -vcodec dnxhd -b 60Mb -acodec copy output.mov
- 60Mbit is a 720p bitrate.
- This is a good ffmpeg for pro users help site:
http://www.itbroadcastanddigitalcinema.com/ffmpeg_howto.html- http://wiht.link/FFmpeg_intro
- This is the command line I got from Baptiste who is developing the DNxHD stuff in ffmpeg.
- Progressive:
- fmpeg -i inputfile.mp4 -vcodec dnxhd -b 185Mb -acodec pcm_s16le outputfile.mov
- Interlaced: (The difference is the -flags +ildct)
- ffmpeg -i inputfile.mp4 -vcodec dnxhd -b 185Mb -flags +ildct -acodec pcm_s16le outputfile.mov
- Progressive:
- And this is a link to a DNxHD white paper:
- http://www.avid.com/resources/whitepapers/DNxHD_WP3.pdf
- Dead link as of 2010-12-23; use http://www.avid.com/static/resources/documents/solutions/DNxHD.pdf instead.
- http://www.avid.com/resources/whitepapers/DNxHD_WP3.pdf
- We are thinking of using 36Mbit DNxHD but all people we talk to say to use 185Mbit or maybe 120Mbit and that 36Mbit is for offline.
- But if you don’t have a problem using allot of GB on disc then go for Max Mbit for the specific resolution and framerate you use:
- 1080p/25 DNxHD 185 1920 x 1080 8bit 25fps = -b 185Mb
- 720p/50 DNxHD 175 1280 x 720 8bit 50fps = -b 90Mb
- 1080i/50 DNxHD 185 1920 x 1080 8bit 25fps = -b 185Mb
- More settings for other framerates:
http://www.itbroadcastanddigitalcine…#Encoding_VC-3- Had many commandlines and DNxHD settings, though sadly none for 1080p50 (as I require).
- …and link is dead – as of 2016-08-18
Information from http://forum.doom9.org/showthread.php?t=130781
- FFmpeg is now providing Avid DNxHD (SMPTE VC-3) encoding and decoding features