libavformat branch: high CPU usage on Ubuntu 18.04 and OF 0.10.0

[pierrep]

If I run one of the demo 480p hap videos I found online in the example, my CPU shoots to around 100-120% CPU usage according to the 'top' tool.

Running the same video through MPV uses around 18% CPU.

I tried converting the same file again using FFMPEG but got no benefits.

Any tips to get better performance?

[bangnoise]

Could you link to (or just name if it's one of the Vidvox samples) your specific test file? What hardware are you on, and which graphics driver?

[luiscript]

I have the same issue running on MacOS with a Macbook pro Retina mid 2012 (NVIDIA GeForce GT 650M). The video is a 15'' clip (aprox. 340 MB file size) with audio at FullHD resolution and is taking 130% of CPU. If I load the same file with VDMX it only takes 25 % of CPU.

Just for testing I rendered the same file without audio and it works normal (30% of CPU). So I guess the problem is with audio stuff. Do I need to choose a specific audio format for rendering the video? Original file was encoded with PCM lineal audio format, I did another test with flac format and video was fine, taking 30% of CPU but no sound was played.

Thanks for reading this.

[pierrep]

Hi @bangnoise only just around to looking at this again. The files I used are here http://vidvox.net/download/SamplePackOneHap1080p.zip

I'm on an Intel HD620, with Intel i5-7200U CPU, Mesa 18.2.8

~~I haven't tried but it could well be the audio issue that @luiscript mentions. All these files have audio.~~

After re-exporting all my files to not use audio (using FFMPEG), the CPU usage drops dramatically, to around 15-30%. So it would appear to be a problem with the audio.