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@s4y youtube-dl will indeed transcode when it needs to (--audio-format option) but you are right here: it should not be the case with that line, because you are forcing youtube-dl to download two files (bestaudio[ext=mp4] and bestvideo[ext=m4a]) that have the same kind of container in common (mp4), so whatever their content, when remuxing it, they will be stacked in another mp4 without any ...
Calculate the bitrate you need by dividing your target size (in bits) by the video length (in seconds). For example for a target size of 1 GB (one giga byte, which is 8 giga bits) and 10 000 seconds of video (2 h 46 min 40 s), use a bitrate of 800 000 bit/s (800 kbit/s): ffmpeg -i input.mp4 -b 800k output.mp4.
ffmpeg -i input.mkv -c:v libx265 -vtag hvc1 -c:a copy output.mkv. If you want to further reduce the filesize, x265 supports CRF and two different target bitrate algorithms: Similar to x264, the x265 encoder has multiple rate control algorithms, including: 1-pass target bitrate (by setting -b:v) 2-pass target bitrate; Constant Rate Factor (CRF)
Some YouTube content creators split their videos into chapters. A subset of them kindly offer the list of chapters titles on description video, with their starting timestamp. Sometimes they decide not to show them.
youtube-dl provides another two separate parameters, --write-info-json and --skip-download If you just use --write-info-json you'll get the json written but also the video, which is not wanted If you just use --skip-download you'll get nothing downloaded
Just use what is built into ffmpeg to do exactly this. ffmpeg -i invid.mp4 -threads 3 \. -vcodec copy -f segment -segment_time 10:00 \. -reset_timestamps 1 \. cam_out_h264_%02d.mp4. This will split it into roughly 10-minute chunks, split at the relevant keyframes, and will output to the files cam_out_h264_01.mp4, cam_out_h264_02.mp4, etc.
10. The movie can be easily downloaded using the FFmpeg command line tool: ffmpeg -protocol_whitelist file,http,https,tcp,tls,crypto -i my_movie.m3u8 -c copy my_movie.ts. Note that if the .m3u8 file was downloaded from the Internet and contains relative URLs, those URLs will need to be converted to absolute URLs.
Yes, this looks like it's working right because you're SSH'ing to localhost, but in reality it's failing and mplayer is falling back to /dev/video0 on localhost. If you try these commands SSHing to a different computer (i.e. not localhost), you'll see your local webcam, not the remote one. – Jason Antman.
3. Problem in a nutshell: cannot enable hardware video acceleration in Chrome. My desktop has integrated GPU Intel UHD 750 and Core i5 11600 and it runs Kubuntu 20.04. Initially, I had no hardware acceleration at all, so that even VLC played videos without acceleration, despite I had intel-media-va-driver-non-free installed.
29. You can try and use Untrunc to fix the file. Restore a damaged (truncated) mp4, m4v, mov, 3gp video. Provided you have a similar not broken video. you may need to compile it from source, but there is another option to use a Docker container and bind the folder with the file into the container and fix it that way.