Can i change .mov Apple ProRes 422 codec to H.264 format without losing video quality with ffmpeg?
File size may be greater than 5GB.
I am trying to get the solution to convert video without losing its quality.
output format should be .mov.
Related
I have a .webm file that contains only audio encoded in the OPUS codec (no video). I want to know how i can extract each individual OPUS frame from the file without decoding it into PCM and re-encoding it.
I'm developing video streaming website using MSE.
Each video converted to FragmentedMP4 (h264,aac => avc1,mp4a)
It is working very fine but what if I wanted to use webm format? like YouTube or Facebook they sometimes use it.
I want to know how to get index (like sidx atom in fmp4) from VP8, VP9 or vorbis codec
I use bento4 and ffmpeg to get metadata from video and audio
but bento4 is for MP4 Just, and use MP4BoxJS to parse index in browser by JavaScript.
What should I use? ffmpeg or what to create fragmented webm or something like that and get index stream info to append segments to MSE SourceBuffer and sure it should be seekable stream..
I have Live stream with video and audio substream , I want to add third stream of subtitle as srt subtitle stream and generate output stream with dvb subtitle stream along with video and audio.
Here I can able convert add third stream (srt subtitle stream) in output stream as dvb subtitle.Third stream with dvb subtitle generated but not able to see subtitle data in VLC player.Here proble is ffmepg can not able to convert srt datra to dvb subtitle data, ffmpeg only able to convert "srt to srt" or "dvb(Bitmap) to dvb(Bitmap)" my concern is how to transcode (convert) srt subtitle data to dvb subtitle (BITMAP format) data.Need some logic or idea to step foreword.
Or any other way to doing this?
I have tried some tool that convert srt to dvb(Bitmap) format and add that converted file as input in ffmpeg , This way I can able to create third stream as dvb subtitle even I can able to see subtitle in VLC.Now I want to convert with my own as I my input stream is LIVE stream.I can't use tool to convert it need some proper logic to convert it.
I have tried multiple ffmpeg command to convert srt to dvb format but ffmepg have written code if input and output format of subtitle is same, no code I have found in ffmpeg that able to convert srt to dvb subtitle.
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.
Do you guys know what happen?Why encoded frame like that?
My test code:
https://github.com/BeiKeJieDeLiuLangMao/videotoolbox
Resolution
Data should align to 32.
I want to generate video using QTRLE codec and with ARGB pixel format using ffmpeg lib.
I am able to create video using H264 with YUV420P pixel format, but unable to do same with QTRLE.So how can i do this?
I suppose that your first video, the one you create using H264 with YUV240p pixel format is a mp4, and I suppose that you want to also generate a MP4 video with the QTRLE codec and ARGB pixel format.
The problem is QTRLE codec is not compatible with the mp4 container, so you cannot have an mp4 file encoded in qtrle. The container I know compatible with it is MOV. I tried it and there is no problem.