I have to create a streaming of this images between two PC. No grain, noise retained, posibly bugy encode due to ffmpeg pipe Doing two pass procedure, that is exporting from ffmpeg to out.yuv and then encoding that yuv makes no difference./SvtAv1EncApp -i out.yuv -fps 25 -rc 0 -q 20 -preset 8 -irefresh-type 2 -passes 2 -n 500 -w 1920 -h 1080 -stats woot.stat -film-grain 50 -b. I want to know what's wrong with the decoder.This is probably a trivial question but I'm going crazy with this (ffmpeg) framework.īased on this post ( sws_scale YUV -> RGB distorted image) (and much more searches) I've written the following code to take a char* pointer to a buffer image (Mono8 or RGB24) and I convert to YUV420P to encode in x264. But what if the width or height was changed to some value else, 9 didn't work. I guessed that cause I knew the width and height of the source picture. Using ffmpeg to encode a raw video to H.264 format 10 On a Ubuntu 10.04, I am trying to encode a raw video (YUV format) to a H.264 encoded video using below ffmpeg commands: ffmpeg -i input.mp4 output.h264 but I get an error saying Unsupported codec for output stream 0.0 Then when I try this option: ffmpeg -i input.mp4 -formats h264 output. This tells FFmpeg to copy the compressed video stream into the new file without re-encoding. Memcpy(out + offset_out, tmp, offset_tmp) This is easily done in FFmpeg with this command string: ffmpeg -i input.mp4 -c:v copy -c:a copy output.mov The new commands here are as follows: -c:v copy Video codec, copy. Many options are passed to the encoder with -svtav1-params. See also FFmpeg documentation, the upstream encoder user guide and list of all parameters. For options available in your specific build of FFmpeg, see ffmpeg -help encoderlibsvtav1.
Uint32_t *tmp = (uint32_t *)malloc(width * height * 4) To enable support, FFmpeg needs to be built with -enable-libsvtav1. Update：I converted the yuv444p output into BGRA with sws_scale(), then I make a transforment with the follow codes int offset_out = 0, offset_tmp = 0 The decoder worked well when decoding packets encoded from yuv420p.ĭid I miss anything when decoding those packets encoded from yuv444p frames? Here is the intialization of the decoder: AVCodec *codec = avcodec_find_decoder(AV_CODEC_ID_H264) ĪVCodecContext *codecCtx = avcodec_alloc_context3(codec) FFmpeg supports hardware accelerated decoding and encoding via the hwaccel cuda, h264cuvid, hevccuvid and h264nvenc, hevcnvenc modules.
The source frame is an upsize down vlc-player logo. I had an h264 video stream encoded from yuv444p frames, it was played well using vlc or mpv player.īut when I tried to decode it using libavcodec, it just looked like this.
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