Ffmpeg Eagain. Definition at line 3575 of file utils. So, I guess you firs
Definition at line 3575 of file utils. So, I guess you first have to Describe the bug The FFmpeg decoder includes an error handling loop around avcodec_receive_frame which triggers another iteration when it returns value -11 (EAGAIN). Repeat this call until it returns AVERROR (EAGAIN) or an error. @param avctx codec context @param frame This will be set to a reference-counted video or audio frame (depending on the decoder type) Modify width and height values so that they will result in a memory buffer that is acceptable for the codec if you also ensure that all line sizes are a multiple of the respective Not all codecs will follow a rigid and predictable dataflow; the only guarantee is that an AVERROR (EAGAIN) return value on a send/receive call on one end implies that a receive/send call . First I read the AVFrame from input file then pass to avcodec_send_frame(), but when I call avcodec_get_packet() Not all codecs will follow a rigid and predictable dataflow; the only guarantee is that an AVERROR (EAGAIN) return value on a send/receive call on one end implies that a receive/send call Return decoded output data from a decoder. @return 0: success, a frame was returned AVERROR (EAGAIN): output is not available in this state ffmpeg为在linux下开发的开源音视频框架，所以经常会碰到很多错误(设置errno)，其中EAGAIN是其中比较常见的一个错误(比如用在非阻塞操作中)。 On success, it will return an AVPacket with a compressed frame. c. AVERROR_EOF if there will be no more output frames It is perfectly normal if avcodec_receive_frame returns EAGAIN, it only means you must feed additional packets to the decoder with avcodec_send_packet before you can receive frames. The AVERROR (EAGAIN) return value means that new 根据 FFmpeg 的官方文档， EAGAIN 是一个特殊的返回值，表示需要更多的数据才能完成操作。 在音视频处理中，通常是指需要更多的输入数据才能继续处理。 This assumes that the only valid response from avcodec_receive_frame is 0 (success), however, EAGAIN (meaning the codec needs more data) is also a valid response. Not all codecs will follow a rigid and predictable dataflow; the only guarantee is that an AVERROR (EAGAIN) return value on a send/receive call on one end implies that a receive/send call Not all codecs will follow a rigid and predictable dataflow; the only guarantee is that an AVERROR (EAGAIN) return value on a send/receive call on one end implies that a receive/send call AVERROR (EAGAIN) if no frames are available at this point; more input frames must be added to the filtergraph to get more output. Modify width and height values so that they will result in a memory buffer that is acceptable for the codec if you also ensure that all line sizes are a multiple of the respective Modify width and height values so that they will result in a memory buffer that is acceptable for the codec if you also ensure that all line sizes are a multiple of the respective Describe the bug The FFmpeg decoder includes an error handling loop around avcodec_receive_frame which triggers another iteration when it returns value -11 (EAGAIN Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that All calls to av_buffersink_get_buffer_ref will return a buffer with exactly the specified number of samples, or AVERROR (EAGAIN) if there is not enough. Referenced by adpcm_encode_init (), aiff_write Modify width and height values so that they will result in a memory buffer that is acceptable for the codec if you also ensure that all line sizes are a multiple of the respective linesize_align [i]. In theory, sending input can result in EAGAIN - this should happen only if not all output was received. Returns Number of bits per sample or zero if unknown for the given codec. The last buffer at EOF will be I tried to create a video from a sequence of input images with ffmpeg API. You can use this to structure alternative decode or encode loops other than the one From the other hand, if you return you will not actually 'decode' all the frames until you get AVERROR (EAGAIN) which means that you might lose some frames. Usage: qsv_transcode input_stream codec output_stream initial option { frame_number Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that 0: success, a frame was returned AVERROR (EAGAIN): output is not available in this state - user must try to send new input AVERROR_EOF: the decoder has been fully flushed, and Modify width and height values so that they will result in a memory buffer that is acceptable for the codec if you also ensure that all line sizes are a multiple of the respective linesize_align [i]. FFmpeg是一个开源的跨平台音视频处理工具集，它由一个主命令行工具和一组库组成，提供了音视频编解码、格式转换、流媒体处理、音视频过滤、音视频录制和播放等功能。 Note that the function will always call av_frame_unref (frame) before doing anything else. Please read the Perform QSV-accelerated transcoding and show to dynamically change encoder's options.