ilovejedd
26th October 2006, 07:03
This is just something I've noticed when encoding videos using ffmpeg to PSP format.
Commandline is simply:
ffmpeg -y -i "<%InputFile%>" -bitexact -vcodec h264 -coder 1 -bufsize 128 -g 250 -s 320x240 -r 29.97 -b 384 -acodec aac -ac 1 -ar 48000 -ab 32 -f psp "<%OutputFile%>.MP4"Assuming the sources are a regular DVD rip (already decrypted to HDD) and an AVI of the same movie (1500kbps DivX or XviD w/orig AC3), both having the same resolution, I'm curious, why does the AVI take significantly less time to encode than the DVD? Or is this a peculiarity in ffmpeg?
This was done using an AMD Sempron 3200, 1GB RAM, AVI and DVD sources were located on a different hard drive from the output. No formal tests, it was just something I noticed.
Commandline is simply:
ffmpeg -y -i "<%InputFile%>" -bitexact -vcodec h264 -coder 1 -bufsize 128 -g 250 -s 320x240 -r 29.97 -b 384 -acodec aac -ac 1 -ar 48000 -ab 32 -f psp "<%OutputFile%>.MP4"Assuming the sources are a regular DVD rip (already decrypted to HDD) and an AVI of the same movie (1500kbps DivX or XviD w/orig AC3), both having the same resolution, I'm curious, why does the AVI take significantly less time to encode than the DVD? Or is this a peculiarity in ffmpeg?
This was done using an AMD Sempron 3200, 1GB RAM, AVI and DVD sources were located on a different hard drive from the output. No formal tests, it was just something I noticed.