ffmpeg 中copy 参数表示不对源媒体进行转码，保留原始编码方式 m4a是音频封装（BOX），能封装mp3/aac编码...
* frame size is not restricted. * - decoding: may be set by some decoders to indicate constant frame size */intframe_size; 根据2,尝试设置 AV_CODEC_CAP_VARIABLE_FRAME_SIZE ,设置方式如下: audioCodec->capabilities =AV_CODEC_CAP_VARIABLE_FRAME_SIZE; 问题解决 3、解决方法 方法一: 设置 编码...
fprintf(stderr, "Error while decoding frame %d\n", *frame_count); return len; } if (got_frame) { printf("Saving %sframe %3d\n", last ? "last " : "", *frame_count); fflush(stdout); /* the picture is allocated by the decoder, no need to free it */ snprintf(buf, sizeof(b...
添加一个新的列IsActive,并将其数据类型设置为bit,并希望将其设置为not null。无法在列IsActive中插入null 在sql server 2019中设置cdc并注册debezium sql server连接器后运行kafka consumer时,无法生成任何日志 TypeError:遇到此类错误并希望保留当前设置时,应执行以下操作:无法读取未定义的.What的属性“”send“” ...
// 对于ffmpeg音频的frame,表示frame中采样的数量 一般设置AVFrame.nb_samples = AVCodecContext.frame_size; 此外要注意:AV_CODEC_CAP_VARIABLE_FRAME_SIZE // For audio: If AV_CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame can have any number of samples. If it is not set, frame->nb_sa...
frame->nb_samples, frame->channels); //编码每一帧的字节数 size = av_samples_get_buffer_size(NULL, pCodecCtx->channels, pCodecCtx->frame_size, pCodecCtx->sample_fmt, 1); frame_buf = (uint8_t *) av_malloc(size); //一次读取一帧音频的字节数 ...
-s size set frame size (WxH or abbreviation) -aspect aspect set aspect ratio (4:3, 16:9 or 1.3333, 1.7777) -display_rotation angle set pure counter-clockwise rotation in degrees for stream(s) -display_hflip set display horizontal flip for stream(s) (overrides any display rotation if it...
NULL, &got_frame); av_frame_free(NULL); if (ret < 0) break; if (!got_frame){ ret=0; break; } printf("Flush Encoder: Succeed to encode 1 frame!\tsize:%5d\n",enc_pkt.size); /* mux encoded frame */ ret = av_write_frame(fmtCtx, &enc_pkt); ...
//FIXME Set low_delay = 0 when has_b_frames = 1 st->internal->avctx->has_b_frames = 1; /* do we have a video B-frame ? */ delay = st->internal->avctx->has_b_frames; presentation_delayed = 0; /* 存在B帧并且当前包不是B帧数据,显示delay置1 */ ...
settb=1+0.001 设置时间为2倍intb settb=2*intb 设置为默认值 settb=AVTB showcqt 转换音频输入为一个频谱视频输出(用恒Q变换Brown-Puckette算法),乐音的规模从E0到D#10(10个8度) 滤镜接受如下选项: volume 指定转换表达式(对音量的乘数),可含如下变量: ...