Ffmpeg Lossless Compression

I was re-encoding videos downloaded from YouTube with Lossless H.264 (using FFmpeg ) because I'm experimenting with CRF=0. I found that resulting videos are much bigger (1 gigabyte) than the original video (100 megabyte). However, from my knowledge of lossy compression , it is basically like lossless compression (plus, it's the same codec) except

https://video.stackexchange.com/questions/28044/re-encoding-lossy-formats-with-lossless-formats

Lossless compression is the opposite of quot;max. compression quot;; efficient compression is achieved by allowing a certain degree of loss. The compression ratio of lossless algorithms can't be tuned for a great range of speed vs. efficiency; if there are at all any options to change the behaviour, variation in results will be small.

https://forum.videohelp.com/threads/387613-Nvidia-h-265-hevc-lossless

This is a list of lossless video encoders that can be used with FFmpeg . (this list may be outdated) Lossless : ffv1 - ( FFmpeg Video Codec 1) flashsv - (Flash Screen Video 1) gif - (Graphics Interchange Format) png - (Portable Network Graphics) qtrle - (Apple Quicktime Animation (RLE)) zmbv - (Zip Motion Block / DosBox...

https://antumdeluge.wordpress.com/lossless-ffmpeg-video-encoders/

Lossless Encoding #182;. x265 can encode HEVC bitstreams that are entirely lossless (the reconstructed images are bit-exact to the source images) by using the -- lossless option. Lossless operation is theoretically simple. Rate control, by definition, is disabled and the encoder disables all quality metrics since they would only waste CPU cycles.

https://x265.readthedocs.io/en/master/lossless.html

@khawar512 ffmpeg uses ffmpeg -i input.j2k -c:v libopenjpeg -pix_fmt yuv420p out.j2k for lossless , add - compression _level xx for lossy, native encoder (-c:v jpeg2000 -pred 1, where -pred 1 is for lossless ) is still really broken. You can also use yuvj420p for full range and yuv422p, yuv444p, yuv444p16le, etc

https://github.com/uclouvain/openjpeg/issues/1183

Lossless H.264. You can use -qp 0 or -crf 0 to encode a lossless output. Lossless Example (fastest encoding but not best compression ) ffmpeg -i input -c:v libx264 -preset ultrafast -qp 0 output.mkv. Lossless Example (best compression ) ffmpeg -i input -c:v libx264 -preset veryslow -qp 0 output.mkv. Now, if I set -crf 0 even on a cropped video, I

https://forum.videohelp.com/threads/352346-ffmpeg-how-to-lossless-convert-video-codec-to-libx264-CRF-qp-value

Wavpack vs FFMPEG Wavpack. 2019-10-12 18:29:34. A couple of oddities I noticed: Wavpack 5.1 as provided by upstream produces larger files (~3-4 kbps) on extra high with no extra processing in Foobar2000 vs. quot; Compression level 3quot; in FFMPEG native, which suggests it's comparable to -hh. When loading a file produced with quot; Compression level 3quot; ...

https://hydrogenaud.io/index.php?topic=118278.0

Format Description for FFV1 -- FFV1 is a lossless intra-frame codec from the FFmpeg project. The description states that FFV1 is a quot;simple and efficient lossless intra only codec,quot; meaning that the compression is applied within each frame as opposed to inter-frame compression which is applied over groups of frames.

https://www.loc.gov/preservation/digital/formats/fdd/fdd000341.shtml

Lossless encode with nvenc? I want to write a script so that every time I press a hotkey it'll run ffmpeg and grab my screen. Since my cpu isn't great, I have to save the video using a fast codec. Using nvenc doesn't seem like a bad option, but I want to record with lossless compression . Preferably in yuv420 (yeah, I know yuv420 isn't true

https://www.reddit.com/r/ffmpeg/comments/paw79b/lossless_encode_with_nvenc/

However, I’m pretty sure that a lossless 720p, 60 fps, 4:2:0 file should be closer to 640 Mb/s (80MB/s). I’m using Windows 10 1809 x64, a nightly build of FFmpeg x64 that is newer than 4.0.2, Nvidia 399.24, and an Elgato 4K60 Pro. Does this command produce lossless capture? And how can I improve it?

https://video.stackexchange.com/questions/25034/lossless-capture-with-ffmpeg

Based on what is said on ffmpeg h264 documentation with the -qp 0 or -crf 0 options libx264 should work in lossless mode. You can use -qp 0 or -crf 0 to encode a lossless output. Use of -qp is recommended over -crf for lossless because 8-bit and 10-bit x264 use different ...

https://video.stackexchange.com/questions/16674/using-h264-in-loseless-mode-brings-small-unexpected-results

ffmpeg -i out.mp4 -map 0:v -c:v copy -bsf:v h264_mp4toannexb raw.h264 ffmpeg -fflags +genpts -r 30 -i raw.h264 -c:v copy output.mp4 The output.mp4 file is now at 30fps but the video still plays too fast (about 3 seconds in the video is 1 second in real time). I tried the minterpolate filter using:

https://www.reddit.com/r/ffmpeg/comments/hb47m6/16bit_video_encoding_with_ffmpeg/

In FFmpeg 's H.264 Video Encoding Guide we are told: . Tip: If you're looking for an output that is roughly quot;visually lossless quot; but not technically lossless , use a -crf value of around 17 or 18 (you'll have to experiment to see which value is acceptable for you). It will likely be indistinguishable from the source and not result in a huge, possibly incompatible file like ...

https://video.stackexchange.com/questions/27656/whats-the-difference-between-visually-lossless-and-real-lossless-and-what-doe

Here is the command that I am currently using: ffmpeg -threads 4 -y -f dshow -video_size 3840x2160 -rtbufsize 2147.48M -i video=quot;AVerMedia HD Capture GC573 1quot; -an -vsync 0 -c:v hevc_nvenc -preset lossless -pix_fmt p010 quot;d:\captures\out.mkvquot;. The major problem that I am having is that the threads option doesn’t seem to do anything.

https://www.reddit.com/r/ffmpeg/comments/adw16e/lossless_hdr_capture/

ffmpeg lossless-compression google-pagespeed. Share. Improve this question. Follow asked Oct 31 '12 at 11:33. user1788377 user1788377. 69 1 1 silver badge 2 2 bronze badges. Add a comment 1 Answer Active Oldest Votes. 7 First of all -s 145*108 is not a

https://stackoverflow.com/questions/13156961/optimized-images-with-ffmpeg

@khawar512 ffmpeg uses ffmpeg -i input.j2k -c:v libopenjpeg -pix_fmt yuv420p out.j2k for lossless , add - compression _level xx for lossy, native encoder (-c:v jpeg2000 -pred 1, where -pred 1 is for lossless ) is still really broken. You can also use yuvj420p for full range and yuv422p, yuv444p, yuv444p16le, etc

https://github.com/uclouvain/openjpeg/issues/1183

Lossless H.264. You can use -qp 0 or -crf 0 to encode a lossless output. Lossless Example (fastest encoding but not best compression ) ffmpeg -i input -c:v libx264 -preset ultrafast -qp 0 output.mkv. Lossless Example (best compression ) ffmpeg -i input -c:v libx264 -preset veryslow -qp 0 output.mkv. Now, if I set -crf 0 even on a cropped video, I

https://forum.videohelp.com/threads/352346-ffmpeg-how-to-lossless-convert-video-codec-to-libx264-CRF-qp-value