i have lots of downloaded… ISOs… that i need to converto to save space. I would like to make them all of the same size, let’s say 720p, and same format, let’s say h265.
I am on linux and the… ISOs… are sorted into a neatly named hierarchy of sub-folderds, which i want to preserve too. What is the best tool (CLI) for the scope? I can use ffmpeg with a bash script, but is there anything better suited?
I compared a bunch of crf values, taking video quality, encode time and file size into account on a few episodes from some of my favorite shows and ended up settling on this.
For the most part, I don’t notice a quality difference compared to my source, but it might just be because of my bad eyes or my monitor lol. But I did notice quality differences around 35 + so they were out.
At crf 0 I’m encoding a 40 min epsisode in about 5 mins which I’m happy with, I probably could have saved time going for a higher value but most of the time I run the script when I’m sleeping so time wasn’t a big issue as long as it wasn’t taking 20+ mins to encode 1 file
Going for 0 meant I’d have as close to the same quality as my source, using the default preset, and I didn’t notice huge file size differences between 0 and 30.
I’ve encoded pretty much all of my TV shows now and I’ve dropped the size of my TV directory to about 1/4 of the original size so going for a higher crf value didn’t seem worth it to me, if I had noticed that my file size at crf 5 was half what it is at crf 0 then I would probably have went with crf 5
I think its pretty subjective some people are happy with 720p and others won’t settle for less than 4k so I don’t think this would be a great solution for everyone to do but I think people should play around with different parameters to see what works best for them.
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I’ve been using a for loop with ffmpeg to convert to AV1
I start in the series root folder and it iterates through each seasons subfolder
Since I’m happy with the quality of everything so far, I’ve added this to the start to make it easier to delete the old files
And at the end I’ve added this to delete the old files
Why
-crf 0?https://trac.ffmpeg.org/wiki/Encode/AV1
I compared a bunch of crf values, taking video quality, encode time and file size into account on a few episodes from some of my favorite shows and ended up settling on this.
For the most part, I don’t notice a quality difference compared to my source, but it might just be because of my bad eyes or my monitor lol. But I did notice quality differences around 35 + so they were out.
At crf 0 I’m encoding a 40 min epsisode in about 5 mins which I’m happy with, I probably could have saved time going for a higher value but most of the time I run the script when I’m sleeping so time wasn’t a big issue as long as it wasn’t taking 20+ mins to encode 1 file
Going for 0 meant I’d have as close to the same quality as my source, using the default preset, and I didn’t notice huge file size differences between 0 and 30.
I’ve encoded pretty much all of my TV shows now and I’ve dropped the size of my TV directory to about 1/4 of the original size so going for a higher crf value didn’t seem worth it to me, if I had noticed that my file size at crf 5 was half what it is at crf 0 then I would probably have went with crf 5
I think its pretty subjective some people are happy with 720p and others won’t settle for less than 4k so I don’t think this would be a great solution for everyone to do but I think people should play around with different parameters to see what works best for them.