// default behavior is to extract all framesawaitextractFrames({input:'media/1.mp4',output:'./frame-%d.png'})// generated screenshots:// ./frame-1.png// ./frame-2.png// ...// ./frame-100.png API extractFrames(options) Extracts one or more frames from a video file. Returns aPro...
h264_find_frame_end(p, &pc->buffer[pc->last_index + next], -next, avctx); } } // 解析NAL单元 parse_nal_units(s, avctx, buf, buf_size); if (avctx->framerate.num) avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1})); ...
A way to extract frames from a video and pipe the resulting frames into a pyspark DF for further processing, without needing a huge cluster that can only preprocess some minutes of video at a time (making it prohibitively expensive). I am very open for using different libraries and di...
st->internal->info->fps_last_dts_idx = st->codec_info_nb_frames; } // 提取额外数据数组 if (!st->internal->avctx->extradata) { ret = extract_extradata(st, pkt); if (ret < 0) goto unref_then_goto_end; } // 如果仍然没有信息,则打开解码器尝试解码一帧 // 针对MPEG-4, 需要为...
From each stream we can extract pieces (slices) of data called packets that will be loaded into components named AVPacket.The data inside the packets are still coded (compressed) and in order to decode the packets, we need to pass them to a specific AVCodec....
chomp evc_frame_merge hapqa_extract mjpega_dump_header null setts vp9_superframe dca_core extract_extradata hevc_metadata mov2textsub opus_metadata text2movsub vp9_superframe_split Enabled indevs: alsa fbdev lavfi oss v4l2 xcbgrab Enabled outdevs: ...
$frame = $video->frame(FFMpeg\Coordinate\TimeCode::fromSeconds(42)); $frame->save('image.jpg');If you want to extract multiple images from the video, you can use the following filter:$video ->filters() ->extractMultipleFrames(FFMpeg\Filters\Video\ExtractMultipleFramesFilter::FRAMERATE_EVERY...
[AV_PARSER_PTS_NB]; // 关键帧标志,1代表关键帧,0代表非关键帧 int key_frame; int dts_sync_point; int dts_ref_dts_delta; int pts_dts_delta; int64_t cur_frame_pos[AV_PARSER_PTS_NB]; // 当前帧position位置 int64_t pos; // 上一帧position位置 int64_t last_pos; // 帧时长 int ...
一般来说先定义一个int64_t lastpts = 0;编码前AVFrame->pts = lastpts;然后lastpts = lastpts + AVFrame->nb_samples; 进行avcodec_encode_audio2后,packet就是编码的数据,然后进行时间基的转换,用av_rescale_q函数时间。 最后写到av_interleaved_write_frame即可,因项目音频重采样有点问题,先不上代码了,...
codec_id;ret=avcodec_parameters_to_context(avctx,st->codecpar);if(ret<0)gotofind_stream_info_err;if(st->request_probe<=0)st->internal->avctx_inited=1;codec=find_probe_decoder(ic,st,st->codecpar->codec_id);/* Force thread count to 1 since the H.264 decoder will not extract...