![]() The best result seems to be running one ffmpeg per core of your host - which (for bmp) yields near-linear improvements in speed (until you hit some other bottleneck, like disk). Otherwise, the whole video will be decoded and the unrequired frames will be discarded 4 years, 8 months ago ^ updated url: /wiki/Seeking 4 years, 7 months ago If you have CPU cycles to spare, you can extract from multiple videos in parallel: parallel -i -%03d.bmp ::: *mpg 4 years, 6 months ago Since this is top of google, I'd like to note that in 2018 this is still an approach that yields dividends. ![]() BTW - excellent idea 4 years, 9 months ago To extract all frames: ffmpeg -r 1 file.mp4 -r 1 "$filename%03d.png" 4 years, 9 months ago Good tip adding -ss before -i. 4 years, 10 months ago bc is not a native Ubuntu package, instead one can use bash: let "i = $i * 60". Can I tell ffmpeg to render everything? 5 years, 11 months ago just remove the -r parameter this will extract all frames 5 years, 6 months ago I'd like to add that while JPEG isn't really hard on the CPU, uncompressed Bitmaps is really really hard on the storage, so I doubt you'll get higher throughput with BMP compared to JPEG. 1 2 years, 6 months ago Related Topics video ffmpeg Comments 6 years, 8 months ago Feb 2016: as of ffmpeg 2.1, the accurate seek option is now default - /wiki/Seeking 6 years, 3 months ago This results in a lot of frame dropping on my machine.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |