See Display video difference with ffmpeg’s overlay filter. You may need to add ,format=yuv420p to the end of your filterchain (immediately after difference) to view the output in non-FFmpeg based players.c:v libx264 -crf 18 -c:a copy output.mkv 0) based gimp image-editing gstreamer camera-raw yuv. filter_complex "blend=all_mode=difference" \ Jetson TK1/Tegra Linux Driver Package Multimedia User Guide DA07303-2. Using ffmpeg ffmpeg -i original.mkv -i encoded.mkv \ yuv extension, a dialog box for entering parameters will open. How to compare two YUV files with different chroma subsampling in VQ Analyzer VQ Analyzer has an option of comparing two files with different chroma subsampling. There are modes other than difference that may fit your needs. 4:0:0 has no chroma channel at all, it is a monochrome image. Alternatively you could output a video with ffmpeg then watch it as shown below. Using ffplay ffplay -f lavfi \īlend is slow, and this command may not play in real time depending on your CPU and the inputs. You can use the blend filter to visually compare the difference. Viewing the difference of a lossy output. See the framemd5 muxer to view the hash for each frame. Other losslessly compressed video encoders supported by FFmpeg include: ffv1, ffvhuff, huffyuv, and utvideo. You can see that the MD5 hash can change if you output to a lossy format. Changes to various attributes can occur that can alter the MD5 hash such as the colorspace or chroma subsampling. You may not get the same hash even with a lossless encoder. readfloatframe - Reads and displays frame values stored as a stream of float numbers. mmseq - Converts video file into raw YCbCr format. Functions: divideseq - Divides YUV sequence into segments. ![]() ![]() conversion from 4:4:4 to 4:2:2) Matlab Image Processing Toolbox function imresize is used. Get MD5 hash of the video stream from your original input: $ ffmpeg -loglevel error -i original.vid -map 0:v -f md5 -Ĭonvert to a lossless output: $ ffmpeg -i original.vid -c:v libx264 -qp 0 lossless.mkvĬompare MD5 hash of the lossless video: $ ffmpeg -loglevel error -i lossless.mkv -map 0:v -f md5 - For sequence rescaling and when rescaling chromas (e.g. You can use the FFmpeg MD5 muxer to show that the decoding results in the exact same output:
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