i think I saw some mentioning of bitstream filtering as early as git history starts ... March 2016 But code was quite different back then ... https://git.cinelerra-gg.org/git/?p=goodguy/history.git;a=commit;h=50a589b1d... https://git.cinelerra-gg.org/git/?p=goodguy/history.git;a=blob;f=cinelerra-5... пн, 13 июн. 2022 г., 21:43 Cinelerra GG Bug Tracker < [email protected]>:

On 2022-06-13 18:43, PhyllisSmith mentioned you on:

https://www.cinelerra-gg.org/bugtracker/view.php?id=614

@Andrew-R Looks like this will require some serious analyzing. In checking other render formats, there are zero that have any parameters like: ... | h264_metadata=crop_left=20:crop_right=20 on the first line next to only the 2 parameters like: mp4 libx264 And this is really interesting because to quote the manual (which I did not even know was there and do not remember ever having discussed this):

"In typ.ext encoder parameter files, the first line is defined as:

muxer codec (or) muxer codec | bitstream filter [ bitstream filter options ]

where the | represents piping the codec data through the bitstream filter."

If I can find the original email where this came from, perhaps it will become clearer.