As far as i know VLC, PotPlayer and QuickTime players support ProRes format. ProRes 422, HQĪll ProRes files names must end with 'mov' extension. There are several realizations of ProRes in ffmpeg: Anatoliy's variant ( '-vcodec prores' ), Kostia's variant ('-vcodec prores_ks').Ġ. It's easy also to extract the ProRes codec as a standalone program.

prores Apple ProRes (iCodec Pro) (encoders: prores prores_aw prores_ks) The ProRes codec (both encoder and decoder) is supported by ffmpeg (by default).ĭEVIL. ProRes is tailored to support 4:2:2 and 4:4:4 video with 8,10 and 12 bits per sample. I have tried with ffmpeg 3.2, but same thing happens.Apple ProRes is a particular standard (different from H.264/AVC) developed by Apple to replace M-JPEG. You can download mp4 and bat files that showcase the effect here: The command lines for decoding the frames to jpg and png are these:įfmpeg -i testcase.mp4 -vframes 5 -qscale:v 2 output%03d.jpgįfmpeg -i testcase.mp4 -vframes 5 output%03d.png This is RGB output, using avcodec_decode_video2() and sws_scale() conversion to RGB produces the same blocky chroma. This is YUV decoded output.Ĥ: Video frames decoded with ffmpeg.exe to jpeg, quality is mostly ok, just some jpeg macroblocking is visible.ĥ: Video frames decoded with ffmpeg.exe to png, very blocky chroma. Here is an example of the same frame obtained from a mp4 video created with a static image, the output frame is zoomed in to clearly see the effect.Ģ: YUV 4:2:0 conversion before compressingģ: Video output from MPC HC + LAV decoder. With ffmpeg.exe I get poor chroma only if I output the frames to png, but if I output them to jpg, chroma seems much better (edit: this is due to poor YUV to RGB conversion of ffmpeg's sws_scale()). When I decode their frames using either ffmpeg.exe or avcodec_decode_video2() API function, I get poor chroma resolution, blocky and quite visible in the static zones of the video (edit: avcodec_decode_video2() returns correct YUV, the problem is the YUV->RGB conversion, see my own answer below). The videos have lots of static zones, 2d videogame type. I'm using ffmpeg-3.2.4-win32, static and dev versions from zeranoe page, to decode some h264 mp4 videos I have created with x264 encoder.

Ffmpeg encode yuv to h264