Alex Pokotilo (12020-08-21): > I'm sorry. I'm a newbie. Am I right I just need to commit in following format:
No need to apologize. > first line: short description...... > LF > more details here Exactly. > Should I send a new patch as a separate email or reply to this one ? It does not matter. > I create a filter graph with vf_cuda_overlay in my application. I > start sending frames into a "main" stream link using > av_buffersrc_write_frame. > I start sending frames into a "secondary" stream too almost > immediately. I have one output sink in my filter graph. What are the timestamps (and corresponding time bases) of the first frame you send on each input? > After each write I call av_buffersink_get_frame and get AVERROR_BUG > from vf_overlay_cuda for some time initially but after several frames > it starts returning mixed frame. > I've checked vf_blend and other framesync filters. They do the same as > I did in the fix. The fix is probably right, but I would like to make 100% sure, and I do not have a CUDA setup. Plus, it would help check the code of your application is right. > Maybe the problem In my application I cannot guarantee that both > streams have the same timeline. > Could you please point me to the place where framesync checks second > stream availability before it calls it's filter(overlay_cuda_blend in > my case). > This topic is very complex to me now so any help from your side can > really help me. The code in framesync is rather complex because it is designed to handle a wide variety of cases. If you are willing to make a quick test, this would be interesting: in libavfilter/framesync.c, in the function ff_framesync_init_dualinput, replace fs->in[1].before = EXT_NULL; with EXT_INFINITY and see if it changes something. But most importantly, seeing the timestamps of the frames would let me know if the issue is exactly what I think it is. Regards, -- Nicolas George
signature.asc
Description: PGP signature
_______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
