On 10/25/22, Michael Koch <astroelectro...@t-online.de> wrote: > Am 25.10.2022 um 09:29 schrieb Naveen.B: >>> >>> What do you want to do with the RAW video? You know that you can't play >>> it with most players? >>> >>> Yes, I know it cannot be played with most of th players, I need to see >>> the >>> size of the RAW video and make some compression on it for our further >>> analysis. >> Could you please help me on the missing parameters to generate the >> RAW >> video? > > I did some tests and came to the conclusion that it's impossible to > import a group of numbered raw images. > It's possible to import a single raw image. > It's possible to import a group of numbered images (JPG, PNG, TIF...) > But it's not possible to import a numbered group of raw images. > (To the experts: Please correct me if I'm wrong). > > Anyway it's a bad idea to save the images in raw format. You should use > PNG images, which have a lossless compression, and 16-bit depth is possible. > I recommend that you convert your images to PNG, and then things become > much easier. > > Here is a (Windows) batch file with a few examples: > > rem Make 30 PNG images (48-bit per pixel): > ffmpeg -f lavfi -i testsrc2=s=320x200,format=rgb48 -frames 30 -f image2 > -y image-%%03d.png > > rem Convert these 30 images to a raw video (this conversion is lossless): > ffmpeg -i image-%%03d.png -s 320x200 -pixel_format rgb48 -f rawvideo > -c:v rawvideo -y video.raw > > rem The size of the raw video is exactly 320 * 200 * 2 * 3 * 30 = > 11520000 Bytes > > rem Convert the first frame from the raw video to a PNG image (48-bit > per pixel): > ffmpeg -video_size 320x200 -pixel_format rgb48 -f rawvideo -i video.raw > -frames 1 -y image.png > > rem Convert the raw video to a (almost lossless) MP4 video: > ffmpeg -video_size 320x200 -pixel_format rgb48 -f rawvideo -framerate 30 > -i video.raw -crf 0 -y video.mp4 > > pause > > > I have a question to the experts. The above example works fine with > pixel format rgb48, but with pixel formats gray16 or gray10le the MP4 > output looks wrong. I don't yet understand why. >
Not all muxers support all pixel formats as raw. > Michael > > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". > _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".