I observed some weird behaviour with fast and medium preset, fast preset: *ffmpeg -pixel_format gray10le -s 1600x1300 -r 30 -i CapturedImage-%03d.raw -c:v rawvideo -pixel_format yuv420p -f rawvideo -c:v libx264 -preset fast -crf 18 test.raw*
command output: *frame= 30 fps=0.0 *q=-1.0 Lsize= 320kB time=00:00:00.93 bitrate=2807.6kbits/s speed= 1.1x video:320kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000% In the fast preset while converting to raw, the frames is 30 and fps is 0, what does this mean? medium preset: *ffmpeg -pixel_format gray10le -s 1600x1300 -r 30 -i CapturedImage-%03d.raw -c:v rawvideo -pixel_format yuv420p -f rawvideo -c:v libx264 -preset medium -crf 18 test.raw* command output: *frame= 30 fps= 28* q=-1.0 Lsize= 329kB time=00:00:00.93 bitrate=2887.7kbits/s speed=0.863x video:329kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000% Kind Regards, Naveen B On Fri, Oct 28, 2022 at 7:41 AM pehache <pehach...@gmail.com> wrote: > Le 27/10/2022 à 13:31, Naveen.B a écrit : > > > > > one last question, any idea on how to know/measure how long the ffmpeg > > takes to encode the file. > > The answer depends on too many parameters. > > > i.e, basically I want to know how much time it takes to compress with > > different presets and how much time it takes to encode for an > uncompressed > > RAW video. > > Almost by definition, an truly uncompressed video is not encoded, it's > just writing to the output the data that are in memory (well, almost... > there's still possibly the conversion of the pixel format, from RGB to > YUV420 for instance, but this is quite fast). What will limit the speed > is the read/write performances on the disk you are using, and/or the > time needed to decode the input video. > > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". > _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".