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| | = AV1 Codec Testing = | | = AV1 Codec Testing = |
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| − | <i>Last updated 3/11/2020</i>
| + | I decided this section would be cleaner if I put it on its own page: [[AV1 Codec Testing]] |
| − | | |
| − | AV1 is the newest emerging video coding format currently under development by AOMedia. I was interested in trying it out and seeing how it compares to my current favorite x265, and also the older x264. Keep in mind I'm doing this for my own purposes, so the following benchmarks are not comprehensive and are limited to my own intended use cases.
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| − | | |
| − | The AV! ligrary <code>libaom-av1</code> is not currently available in ffmpeg by default. I found a good script someone made for compiling ffmpeg with support for AV1:
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| − | https://gist.github.com/sparrc/026ed9958502072dda749ba4e5879ee3
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| − | | |
| − | I downloaded the script: | |
| − | <source>
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| − | wget https://gist.githubusercontent.com/sparrc/026ed9958502072dda749ba4e5879ee3/raw/e22698ead1984cd86b943f3473bd4bfb98591808/install-ffmpeg.sh
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| − | </source>
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| − | <i>Note: as always, never download and run a script without reading it yourself to determine that it dos not do anything malicious.</i>
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| − | | |
| − | I ran the script:
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| − | <source>
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| − | sudo bash install-ffmpeg.sh
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| − | </source>
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| − | | |
| − | this script installs the custom ffmpeg into <code>~/bin/ffmpeg</code>.
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| − | | |
| − | I chose a relatively small MTS file for testing:
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| − | <source>
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| − | du -h 00056.MTS
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| − | </source>
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| − | <pre class="out">
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| − | 38M 00056.MTS
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| − | </pre>
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| − | | |
| − | === Runtime Benchmarks ===
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| − | | |
| − | In the following benchmarks, the relevant time is the "real" time. Also, the test file is video:h264 and audio:ac3. Each encoding process I do below uses all default for the format and encodes the audio to aac.
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| − | | |
| − | ==== x264 benchmark ====
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| − | <source>
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| − | time ~/bin/ffmpeg -loglevel -8 -i 00056.MTS -c:v libx264 out_x264.mp4
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| − | </source>
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| − | <pre class="out">
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| − | real 0m28.159s
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| − | user 1m43.388s
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| − | sys 0m0.176s
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| − | </pre>
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| − | | |
| − | ==== x265 benchmark ====
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| − | <source>
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| − | time ~/bin/ffmpeg -loglevel -8 -i 00056.MTS -c:v libx265 out_x265.mp4
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| − | </source>
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| − | <pre class="out">
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| − | real 0m43.420s
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| − | user 2m40.852s
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| − | sys 0m0.304s
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| − | </pre>
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| − | | |
| − | ==== av1 benchmark ====
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| − | <source>
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| − | time ~/bin/ffmpeg -loglevel -8 -i 00056.MTS -c:v libaom-av1 -strict -2 out_av1.mp4
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| − | </source>
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| − | <pre class="out">
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| − | real 177m27.737s
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| − | user 413m16.620s
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| − | sys 0m6.688s
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| − | </pre>
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| − | <i>Note: The "-strict -2" parameter allows for the use of experimental codecs.</i>
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| − | | |
| − | === File Size Comparison ===
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| − | | |
| − | <source>
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| − | du -h out_*;du -h outd*
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| − | </source>
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| − | <pre class="out">
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| − | 11M out_av1.mp4
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| − | 15M out_x264.mp4
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| − | 5.6M out_x265.mp4
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| − | 8.2M outd_av1.mp4
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| − | 13M outd_x264.mp4
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| − | 4.1M outd_x265.mp4
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| − | </pre>
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Latest revision as of 17:32, 11 March 2020
Encoding in H.265
I've seen very good quality and significantly smaller file sizes in videos encoded with H.265.
ffmpeg -i infile.mp4 -c:v libx265 outfile.mp4
Deinterlacing
ffmpeg -i 000000.MTS -vf yadif -c:v libx265 outfile.mp4
Timelapse From Image Files
In the terminal, go into your folder full of images.
neuro@gamma:~/timelapse$ ls
DSC05145.JPG DSC05163.JPG DSC05181.JPG DSC05199.JPG DSC05217.JPG
DSC05146.JPG DSC05164.JPG DSC05182.JPG DSC05200.JPG DSC05218.JPG
DSC05147.JPG DSC05165.JPG DSC05183.JPG DSC05201.JPG DSC05219.JPG
DSC05148.JPG DSC05166.JPG DSC05184.JPG DSC05202.JPG DSC05220.JPG
...
Create a timelapse of all files, with a framerate of 20fps:
ffmpeg -r 20 -f image2 -pattern_type glob -i "*.JPG" -c:v libx265 ../out.mp4
Create a timelapse starting from file 05200, with a total of 30 frames:
ffmpeg -r 20 -f image2 -start_number 05200 -i DSC%05d.JPG -frames:v 30 -c:v libx265 ../out.mp4
Note: the "%05d" means zero-padded 5-digit number.
AV1 Codec Testing
I decided this section would be cleaner if I put it on its own page: AV1 Codec Testing
