Last active
June 4, 2018 06:33
-
-
Save jpxiong/ed8c6326729e3eedcaf8227d56a2f909 to your computer and use it in GitHub Desktop.
save_avframe_as_jpeg of ffmpeg
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| int save_avframe_as_jpeg(AVCodecContext *pCodecCtx, AVFrame *pFrame) { | |
| AVCodec *jpegCodec = avcodec_find_encoder(AV_CODEC_ID_MJPEG); | |
| if (!jpegCodec) { | |
| return -1; | |
| } | |
| AVCodecContext *jpegContext = avcodec_alloc_context3(jpegCodec); | |
| if (!jpegContext) { | |
| return -1; | |
| } | |
| jpegContext->pix_fmt = AV_PIX_FMT_YUVJ420P; | |
| jpegContext->compression_level = 0; | |
| jpegContext->thread_count = 1; | |
| jpegContext->prediction_method = 1; | |
| jpegContext->flags2 = 0; | |
| jpegContext->sample_aspect_ratio = pCodecCtx->sample_aspect_ratio; | |
| jpegContext->time_base = pCodecCtx->time_base; | |
| jpegContext->height = pFrame->height; | |
| jpegContext->width = pFrame->width; | |
| int ret = avcodec_open2(jpegContext, jpegCodec, NULL); | |
| if (ret < 0) { | |
| return -1; | |
| } | |
| FILE *jpegFile; | |
| char jpegFName[256]; | |
| AVPacket packet = {.data = NULL, .size = 0}; | |
| av_init_packet(&packet); | |
| int gotFrame; | |
| if (avcodec_encode_video2(jpegContext, &packet, pFrame, &gotFrame) < 0) { | |
| return -1; | |
| } | |
| sprintf(jpegFName, "%s/test_%lld.jpg", "/sdcard/", packet.pts); | |
| jpegFile = fopen(jpegFName, "wb"); | |
| fwrite(packet.data, 1, packet.size, jpegFile); | |
| fclose(jpegFile); | |
| av_free_packet(&packet); | |
| avcodec_close(jpegContext); | |
| return 0; | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment