> 2019-03-14 11:28 GMT+01:00, Simone Donadini <simone.donad...@avolites.com>: > > Hi there, > > we are developing a transcoder using ffmpeg based on the transcoding example > > https://www.ffmpeg.org/doxygen/4.1/transcoding_8c-example.html and we are > > encountering some problem with memory usage transcoding files with large > > resolutions. > > When transcoding 4K files, the memory usage will go up to 3.4GB but then it > > will stay steady for the rest of the conversion, and clean every thing at > > the end. > > massif (or an equivalent application) can tell you where the memory > is allocated, some decoders absolutely need these allocations, apart > from that my guess is that (a part of) the allocation does not happen > in FFmpeg.
ok, i will try with it. But i am not seeing any memory leak with smaller files, so i am not sure why there would be any when using a greater resolution. > > > While transcoding video files with larger resolution (8K) the app, > > which is 32bit, will run out of memory (>4GB). > > It does not look like a memory leak, as memory usage will grow as long as > > transcoding a certain amount of frames and then it will stay steady. It > > looks like the amount of memory usage depends on the resolution of the > > > frame, but even with a 8K frame using >4GB is not expected. > > Why do you think so? > With our codec one encoded frame 7680x4320 should be ~100MB. > > Is this a known behavior? > > Is there a way to limit the number of frames loaded on memory > > or the amount of memory while transcoding? > > Yes. > (You did not give enough information about input video and > encoder settings.) At the moment i am testing with a file h264 8K @60fps, and the encoder is using the same properties (framerate - size) of the source file. I am using no filters. > > > Or building a 64bit version would fix this issue? > > Most likely. > > Carl Eugen > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
