Merging MP4 files is very common when e edit MP4 files. But how to merge multiple MP4 files with subtitles and reserve the video quality? Here we are going to get more about MP4 merging method.
FFMPEG h264_videotoolbox output is strange I want to use h264_videotoolbox codec to encode my video in FFMPEG lib.I input image format is AV_PIX_FMT_YUV420P, but output video frame like follow. I tried libx264 and all work correctly. FFmpeg enable videotoolbox on iOS I build FFmpeg for iOS and have enabled VideoToolbox, but when decoding video use function avcodec_decode_video2, it doesn't use VideoToolbox and very slow on iPhone. There is a solution which could use ffmpeg to read the data from tcp socket and transfer it to videotoolbox. This solution avoids the high CPU usage when using only ffmpeg and also avoids some faults from using only vdeotoolbox such as delays from reading the data from socket. Feb 24, 2017 · What is the Constant Rate Factor? What bitrates will I get? To give you an estimation of the bitrates to be expected for clips with different resolutions, here’s a figure showing the average bitrate in MBit/s for four one-minute video clips with different encoding complexity, encoded with x264 and different CRF values:
Best Alternative to FFmpeg for Windows 10 Jan 25, 2017 09:05 am / Posted by John Salley to Reviews FFmpeg is a program that you can use to compress video and audio files and thus convert them into different formats, but you have to convert FFmpeg files before using them on Windows 10. Dec 10, 2018 · Learn how to use FFmpeg to convert H.264 to H.265 and type the best command line to re-encode H264 videos to H.265/HEVC in fast speed with no quality loss. Besides, an alternative is also introduced to make H.264 to H.265 encoding easier.
This patch allows to use the Videotoolbox API in asynchonous mode. Note that when using async decoding the user is responsible for releasing the async frame. mpv was compiled against a different version of FFmpeg/Libav than the shared library it is linked against. This is most likely a broken build and could result in misbehavior and crashes. mpv does not support this configuration and will not run - rebuild mpv instead. Additional info: * package version(s) pacman -Qs mpv local/mpv 1:0.26.0-3 ... Dec 10, 2018 · H265 to H264 Tips with FFmpeg. If you'd like to batch convert HEVC to H265 and set other paramters, you need type in a more complicated command on the command window, such as transcode H264 to H265 with ffmpeg or batch conversions. Now, take batch decode H265 to H264 MP4 as an example. This one is a little more complicated. Best Alternative to FFmpeg for Windows 10 Jan 25, 2017 09:05 am / Posted by John Salley to Reviews FFmpeg is a program that you can use to compress video and audio files and thus convert them into different formats, but you have to convert FFmpeg files before using them on Windows 10. May 28, 2019 · ffmpeg -vcodec hevc_videotoolbox -b:v 6000k -tag:v hvc1 -c:a eac3 -b:a 224k -i <source> <target> The gritty details. The invocations above are all you really need to know, but I’ll walk through some caveats and explanations for those interested. CPU versus GPU. libx265 encodes via the CPU while hevc_videotoolbox uses the GPU.