Hi I want to compress avi videos which will be read into ImageJ, which supports the following formats:
https://imagej.nih.gov/ij/plugins/avi-reader.html ``` • Only a few formats are supported: • Uncompressed 8 bit with palette (LUT) • Uncompressed 8 & 16 bit grayscale • Uncompressed 24 & 32 bit RGB (alpha channel ignored) • Uncompressed 32 bit AYUV (alpha channel ignored) • Various YUV 4:2:2 compressed formats • PNG or JPEG-encoded individual frames. • MJPG (motion-JPEG) • Does not read AVI formats with more than one frame per chunk • Palette changes during the video not supported • Out-of-sequence frames (sequence given by index) not supported • Different frame sizes in one file (rcFrame) not supported • Conversion of (A)YUV formats to grayscale is non-standard: All 255 levels are kept as in the input (i.e. the full dynamic range of data from a frame grabber is preserved). For standard behavior, use "Brightness&Contrast", Press "Set", enter "Min." 16, "Max." 235, and press "Apply”. ``` I tried the following ``` ffmpeg -i 20200728_00019.avi -vcodec png 20200728_00019.comp.avi ``` But this gives me an error in ImageJ: "Unsupported compression: 474e504d 'MPNG' in line 16” Is there a way, that I can use ffmpeg to compress an avi moc=vi using PNG compression, and not MPNG? Or am I missing something here? Thanks, Rainer -- Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany) Orcid ID: 0000-0002-7490-0066 Department of Evolutionary Biology and Environmental Studies University of Zürich Office Y34-J-74 Winterthurerstrasse 190 8075 Zürich Switzerland Office: +41 (0)44 635 47 64 Cell: +41 (0)78 630 66 57 email: rainer.k...@uzh.ch rai...@krugs.de Skype: RMkrug PGP: 0x0F52F982 _______________________________________________ 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".
