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This is half a fix for #874 This patch introduces a new config flag: - MediaConvertTgs These need to be treated independently from the existing MediaConvertWebPToPNG flag because Tgs→WebP results in an *animated* WebP, and the WebP→PNG converter can't handle animated WebP files yet. Furthermore, some platforms (like discord) don't even support animated WebP files, so the user may want to fall back to static PNGs (not APNGs). The final reason why this is only half a fix is that this introduces an external dependency, namely lottie, to be installed like this: $ pip3 install lottie cairosvg This patch works by writing the tgs to a temporary file in /tmp, calling lottie to convert it (this conversion may take several seconds!), and then deleting the temporary file. The temporary file is absolutely necessary, as lottie refuses to work on non-seekable files. If anyone comes up with a reasonable use case where /tmp is unavailable, I can add yet another config option for that, if desired. Telegram will bail out if the option is configured but lottie isn't found. |
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