67 lines
2.4 KiB
Plaintext
67 lines
2.4 KiB
Plaintext
How to record Atari videos with Hatari
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======================================
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Getting best output from Hatari
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-------------------------------
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* Do NOT use external recorders (such as Quicktime X on OSX), as they
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won't get perfect framerate and sound sync like Hatari itself does.
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* Disable (default) frame skip, either from the Hatari GUI, or with
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following command line option:
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--frameskips 0
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* For STe you could set audio to 50066 Hz using ST table, either from
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the Hatari GUI, or with following command line options:
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--sound 50066 --ym-mixing table
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* If you have enough free disk space, ask Hatari to use uncompressed
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AVI format for the recording with the following command line option:
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--avi-vcodec bmp
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Hatari AVI compression notes
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----------------------------
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If Hatari is configured/built with PNG development installed headers
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(normal case with Linux distros and pre-built binaries), Hatari will
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use PNG compression to produce smaller AVI recordings.
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Additionally, by default Hatari will use the highest PNG compression
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level (same as with screenshots), but this is *really* CPU intensive.
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Because of the PNG compression CPU usage, it's better to use
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uncompressed BMP format. If you don't have enough disk space for
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this, next best option is to ask Hatari to use lower compression
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level, e.g. with:
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--png-level 4
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Valid compression levels are 0-9, with 9 being default/highest/slowest.
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Preparing videos for uploading
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------------------------------
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If the end goal is Youtube, it's recommended to run Hatari's AVI
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output through ffmpeg to do nearest neighbor upscale to 1080p. Then
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Youtube will keep the 50 FPS and you have non-fuzzy pixels in the
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recording.
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This ffmpeg line should do the trick for a 320x200 stream (5x scale):
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ffmpeg -i hatari.avi -vf "scale=1600:1000, \
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pad=1920:1080:160:40:black" -sws_flags neighbor \
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-vcodec png -acodec copy youtube1080p.mov
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And for a 416x276 stream (so you get the overscan area as well, 4x scale):
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ffmpeg -i hatari.avi -vf "crop=400:270:8:0, scale=1600:1080, \
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pad=1920:1080:160:0:black" -sws_flags neighbor -vcodec png \
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-acodec copy youtube1080p.mov
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Above adds padding to 1920*1080 size, that can be removed if you trust
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the re-encoder/player to scale properly (which has been known to
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fail). It also saves the stream as PNG so it's manageable to upload
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and store for future.
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(Upload information is based on atari-forum post by "evil":
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http://atari-forum.com/viewtopic.php?f=51&t=27595#p268185 )
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