Ffmpeg compress video1/8/2023 ![]() H264 will show up if I run ffmpeg -formats and ffmpeg -codecs, and as I said it will play fine in Quicktime. I have tried forcing it to h264 by adding flags like -f h264 and -vcodec h264 but I get a screenfull of errors (no frame, illegal POC type, sps_id out of range) ending with Could not find codec parameters (Video: h264) If I open the Movie inspector in quicktime it tells me that the original file is an "h264" video and the ffmpeg-processed ones are "mpeg-4". Click on the Video Compress button to open a window on which click the + to add video from your PC. Select the Toolbox section from the primary interface. ![]() Run iSkysoft Video Compressor and load video file Open UniConverter after installing on your computer. The mp4 files will play fine if I download them and play them in the Quicktime player but if I attempt to open them in the Adobe Media Player it reports "The media file does not contain a supported video track". Quick Guide to Compress Video with FFmpeg Alternative - UniConverter Step 1. ![]() After publishing the flv files work fine, but the mp4 files will not play in the flash player: Audio will play but video won't. The user can upload flv files and mp4 files, both of which play fine in the Flash UI before publishing. We have a flash web-app that created interactive video, and are using ffmpeg to do some compression/resizing when a user "publishes" their project.
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