FFmpeg: Added support for writing alpha values in WebM/VP9 video
The VP9 video codec supports writing alpha values; now this is available in Blender too. Reviewed By: brecht Differential Revision: https://developer.blender.org/D5156
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Notes:
blender-bot
2023-02-14 09:44:56 +01:00
Referenced by issue #80769, RGBA movie rendering: WebM/VP9 codec missing alpha channel
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@ -701,6 +701,12 @@ static AVStream *alloc_video_stream(FFMpegContext *context,
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c->pix_fmt = AV_PIX_FMT_ARGB;
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}
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if (codec_id == AV_CODEC_ID_VP9) {
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if (rd->im_format.planes == R_IMF_PLANES_RGBA) {
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c->pix_fmt = AV_PIX_FMT_YUVA420P;
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}
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}
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if (codec_id == AV_CODEC_ID_PNG) {
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if (rd->im_format.planes == R_IMF_PLANES_RGBA) {
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c->pix_fmt = AV_PIX_FMT_RGBA;
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@ -1838,6 +1844,7 @@ bool BKE_ffmpeg_alpha_channel_is_supported(RenderData *rd)
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return ELEM(codec,
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AV_CODEC_ID_QTRLE,
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AV_CODEC_ID_PNG,
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AV_CODEC_ID_VP9,
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# ifdef FFMPEG_FFV1_ALPHA_SUPPORTED
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AV_CODEC_ID_FFV1,
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# endif
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