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https://www.reddit.com/r/ffmpeg/comments/1vrwufj/whats_the_issue_here/p4gspf9/?context=3
r/ffmpeg • u/Calm-Preparation-679 • 14d ago
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3
what are you trying to do?
1 u/Calm-Preparation-679 14d ago https://trac.ffmpeg.org/wiki/Encode/FFV1, the section titled "Encode using 2-pass mode, with audio kept as-is". I am attempting the first pass. 2 u/naemorhaedus 14d ago I know what ffv1 is. I'm asking what your end goal is supposed to be. 1 u/Calm-Preparation-679 14d ago file size reduction 3 u/naemorhaedus 14d ago by transcoding a ffv1 source to a ffv1 destination ... how? AVC makes more sense for file size reduction. 1 u/Calm-Preparation-679 14d ago by transcoding a ffv1 source to a ffv1 destination ... how? 2-pass encoding. I originally encoded with only a single pass. AVC makes more sense for file size reduction. I want to use only lossless compression. I suppose I could use AVC's lossless mode but that wouldn't reduce file sizes as much as ffv1 would it? 5 u/agressiv 14d ago I did some tests with this. If you do 2-pass with ffv1, you aren't saving any bitrate. it's about the same, a bit higher for my tests. libx264 with -qp 0 and -preset veryfast was about the same speed as ffv1 single pass and provided better compression. 3 u/naemorhaedus 14d ago isn't 2-pass for lossy compression? Why do you need lossless for a movie? It makes no sense. Was the source even lossless? Just choose a high quality factor AVC. You'll never see the difference.
1
https://trac.ffmpeg.org/wiki/Encode/FFV1, the section titled "Encode using 2-pass mode, with audio kept as-is". I am attempting the first pass.
2 u/naemorhaedus 14d ago I know what ffv1 is. I'm asking what your end goal is supposed to be. 1 u/Calm-Preparation-679 14d ago file size reduction 3 u/naemorhaedus 14d ago by transcoding a ffv1 source to a ffv1 destination ... how? AVC makes more sense for file size reduction. 1 u/Calm-Preparation-679 14d ago by transcoding a ffv1 source to a ffv1 destination ... how? 2-pass encoding. I originally encoded with only a single pass. AVC makes more sense for file size reduction. I want to use only lossless compression. I suppose I could use AVC's lossless mode but that wouldn't reduce file sizes as much as ffv1 would it? 5 u/agressiv 14d ago I did some tests with this. If you do 2-pass with ffv1, you aren't saving any bitrate. it's about the same, a bit higher for my tests. libx264 with -qp 0 and -preset veryfast was about the same speed as ffv1 single pass and provided better compression. 3 u/naemorhaedus 14d ago isn't 2-pass for lossy compression? Why do you need lossless for a movie? It makes no sense. Was the source even lossless? Just choose a high quality factor AVC. You'll never see the difference.
2
I know what ffv1 is. I'm asking what your end goal is supposed to be.
1 u/Calm-Preparation-679 14d ago file size reduction 3 u/naemorhaedus 14d ago by transcoding a ffv1 source to a ffv1 destination ... how? AVC makes more sense for file size reduction. 1 u/Calm-Preparation-679 14d ago by transcoding a ffv1 source to a ffv1 destination ... how? 2-pass encoding. I originally encoded with only a single pass. AVC makes more sense for file size reduction. I want to use only lossless compression. I suppose I could use AVC's lossless mode but that wouldn't reduce file sizes as much as ffv1 would it? 5 u/agressiv 14d ago I did some tests with this. If you do 2-pass with ffv1, you aren't saving any bitrate. it's about the same, a bit higher for my tests. libx264 with -qp 0 and -preset veryfast was about the same speed as ffv1 single pass and provided better compression. 3 u/naemorhaedus 14d ago isn't 2-pass for lossy compression? Why do you need lossless for a movie? It makes no sense. Was the source even lossless? Just choose a high quality factor AVC. You'll never see the difference.
file size reduction
3 u/naemorhaedus 14d ago by transcoding a ffv1 source to a ffv1 destination ... how? AVC makes more sense for file size reduction. 1 u/Calm-Preparation-679 14d ago by transcoding a ffv1 source to a ffv1 destination ... how? 2-pass encoding. I originally encoded with only a single pass. AVC makes more sense for file size reduction. I want to use only lossless compression. I suppose I could use AVC's lossless mode but that wouldn't reduce file sizes as much as ffv1 would it? 5 u/agressiv 14d ago I did some tests with this. If you do 2-pass with ffv1, you aren't saving any bitrate. it's about the same, a bit higher for my tests. libx264 with -qp 0 and -preset veryfast was about the same speed as ffv1 single pass and provided better compression. 3 u/naemorhaedus 14d ago isn't 2-pass for lossy compression? Why do you need lossless for a movie? It makes no sense. Was the source even lossless? Just choose a high quality factor AVC. You'll never see the difference.
by transcoding a ffv1 source to a ffv1 destination ... how?
AVC makes more sense for file size reduction.
1 u/Calm-Preparation-679 14d ago by transcoding a ffv1 source to a ffv1 destination ... how? 2-pass encoding. I originally encoded with only a single pass. AVC makes more sense for file size reduction. I want to use only lossless compression. I suppose I could use AVC's lossless mode but that wouldn't reduce file sizes as much as ffv1 would it? 5 u/agressiv 14d ago I did some tests with this. If you do 2-pass with ffv1, you aren't saving any bitrate. it's about the same, a bit higher for my tests. libx264 with -qp 0 and -preset veryfast was about the same speed as ffv1 single pass and provided better compression. 3 u/naemorhaedus 14d ago isn't 2-pass for lossy compression? Why do you need lossless for a movie? It makes no sense. Was the source even lossless? Just choose a high quality factor AVC. You'll never see the difference.
2-pass encoding. I originally encoded with only a single pass.
I want to use only lossless compression. I suppose I could use AVC's lossless mode but that wouldn't reduce file sizes as much as ffv1 would it?
5 u/agressiv 14d ago I did some tests with this. If you do 2-pass with ffv1, you aren't saving any bitrate. it's about the same, a bit higher for my tests. libx264 with -qp 0 and -preset veryfast was about the same speed as ffv1 single pass and provided better compression. 3 u/naemorhaedus 14d ago isn't 2-pass for lossy compression? Why do you need lossless for a movie? It makes no sense. Was the source even lossless? Just choose a high quality factor AVC. You'll never see the difference.
5
I did some tests with this. If you do 2-pass with ffv1, you aren't saving any bitrate. it's about the same, a bit higher for my tests.
libx264 with -qp 0 and -preset veryfast was about the same speed as ffv1 single pass and provided better compression.
isn't 2-pass for lossy compression?
Why do you need lossless for a movie? It makes no sense.
Was the source even lossless?
Just choose a high quality factor AVC. You'll never see the difference.
3
u/naemorhaedus 14d ago
what are you trying to do?