View Issue Details
|ID||Project||Category||View Status||Date Submitted||Last Update|
|0001103||DCP-o-matic||[All Projects] Features||public||2017-07-24 09:33||2017-08-25 09:31|
|Target Version||2.13.x||Fixed in Version|
|Summary||0001103: Export options|
|Description||Output image size, frame rate (including interlaced).|
|Tags||No tags attached.|
|Estimated work required||Unknown|
||What does "framerate" mean here? An arbitrary export framerate different from what the DCP was specified as?|
Just my opinion - the export function is a functional side track in DOM. Adding every imaginable option to the export means much work. I think it is completely okay if DOM offers only two options - a 'low quality' (screener), and a high quality (re-use), plus optional audio mixdown. Everything else can be created by other tools with a more dedicated feature set (e.g. handbrake).
we could even abandon the .mov conversion (which btw still doesn’t work on MacOs 10.12.5 & 2.11.19)
in favor of mp4 (which works, including soft-subtitles size and position), and is half as heavy for about the same image
quality. Remember that the main purpose of the DCP to MP4 conversion is to let people perform
fast-forward film previews.
I think it is necessary to have a high quality 'reuse' export option, which the MOV option using ProRes is currently targeting. Some people would say uncompressed/lossless image series would be more appropriate.
I noticed that the MP4 export creates unusually high bit rates, some of my lighter machines can not play without frame losses. I guess it makes sense to lower the bitrate for MP4 (or, sigh, make it selectable (low/mid/high), thus making a higher quality ProRes more useful for those who need it.
Everything else can be created by other tools with a more dedicated feature set (e.g. handbrake).
Hi Carsten, don’t bet on Handbrake for DCP to MP4 conversion. Last year I tried (and failed) to convince its stubborn developer team.
Being stuck to Libav*, they are still unable to convert XYZ to rgb/yuv color space, something that FFmpeg offered to DoM
and the world for years.
* weird result of the 2011 FFmpeg internal war and split.
I don't count on handbrake to convert from DCP, but to all the other formats mentioned above FROM the exports DOMs creates, so, either from MP4 or Prores.
|2017-07-24 09:33||carl||New Issue|
|2017-07-24 14:49||carl||Relationship added||related to 0001075|
|2017-08-15 22:11||carl||Target Version||=> 2.12.0|
|2017-08-21 00:10||carl||Status||new => acknowledged|
|2017-08-21 00:10||carl||Target Version||2.12.0 => 2.13.x|
|2017-08-21 00:11||carl||Note Added: 0001773|
|2017-08-21 11:36||Carsten||Note Added: 0001774|
|2017-08-23 20:43||Cantar4||Note Added: 0001775|
|2017-08-24 11:33||Carsten||Note Added: 0001776|
|2017-08-25 08:56||Cantar4||Note Added: 0001780|
|2017-08-25 09:31||Carsten||Note Added: 0001782|