View Issue Details

IDProjectCategoryView StatusLast Update
0000313Cinelerra-GG[All Projects] Bugpublic2019-11-03 00:07
ReporterAndrea_Paz Assigned ToPhyllisSmith  
PrioritynormalSeverityminorReproducibilityhave not tried
Status acknowledgedResolutionopen 
Product Version2019-08 
Target VersionFixed in Version 
Summary0000313: Problem rendering Ogg format
DescriptionA bug from user D. Quinton.

I have a problem achieving consistent results when rendering with ffmpeg/ogg format - the bitrate of resulting video is always unpredictable:


set bitrate to 9000000 and result is blotchy, from good 20mbps source;

set q=8 resulting bitrate varies each time Cin is started, can be very high,

set q=7 or q=6 bitrate very high, even down to q=1 still high, then set back to q=7 and bitrate is at 8.5Mbps.

some results I've had
q=9 11mbps

q=10 79mpbs

q=5 107mpbs

q=2 28mpbs

q=7 11.5mpbs

With ogg vorbis I used to succeed better. Wild bitrates only create huge files that are difficult to store.




2019-11-03 00:07

manager   ~0002380

Exactly ... in February of this year, the code for native ogg/vorbis was remived because too many errors/not working and ffmpeg version should be better maintained. GG had been consistently fixing the errors in the native OGG code for some time but whenever a new release of the libraries ogg, vorbis, and theora became available it would be broken again. It became a nightmare to continue to repair the native ogg and so the assumption was that ffmpeg developers had more help and would keep it going.

There is no plan to pick up the old nightmare, but I will look to see if there is someone to control the out of control inconsistent results.

Issue History

Date Modified Username Field Change
2019-10-03 19:43 Andrea_Paz New Issue
2019-10-03 19:43 Andrea_Paz Tag Attached: Rendering
2019-11-03 00:07 PhyllisSmith Note Added: 0002380
2019-11-03 00:07 PhyllisSmith Assigned To => PhyllisSmith
2019-11-03 00:07 PhyllisSmith Status new => acknowledged