ffmpeg send_sr

ffmpeg是一个开源的音视频处理工具，可以用于音视频的编解码、转码、剪辑等操作。send_sr是ffmpeg中的一个参数，用于设置音频采样率。

在ffmpeg中，音频采样率是指每秒钟对音频信号进行采样的次数，单位Hz。采样率越高，音频质量越好，但同时也会增加文件的大小。send_sr参数用于设置输出音频的采样率，可以通过指定一个整数值来设置。

例如，如果要将输入音频的采样率设置为44100Hz，可以使用以下命令：

ffmpeg -i input.mp3 -ar 44100 output.mp3

这个命令将输入文件input.mp3的采样率设置为44100Hz，并将结果保存为output.mp3。

相关问题

ffmpeg avcodec_send_packet() 卡住

`avcodec_send_packet()` 可以用于向编码器发送数据包，但是如果该函数被卡住了，通常是由于以下原因所致：

1. 传递给 `avcodec_send_packet()` 的 `AVPacket` 结构体中的数据不完整或不正确。你可以尝试检查一下传递给该函数的 `AVPacket`，确保它包含了完整且正确的媒体数据。
2. 编码器的输出缓冲区已满，无法接收更多的数据。你可以通过调用 `avcodec_receive_packet()` 来获取编码器的输出数据，并在缓冲区有足够空间时再次调用 `avcodec_send_packet()` 。
3. 编码器已经被关闭或出现了其他错误。在这种情况下，你需要检查编码器的状态并确保它正在正常运行。

你可以根据具体情况进行调试，以确定问题的原因，并采取相应的解决方案。

FFmpeg avcodec_send_packet 报错err:Resource temporarily unavailable

The "Resource temporarily unavailable" error in FFmpeg's `avcodec_send_packet()` function typically indicates that the codec's internal buffers are full and cannot accept more data at the moment.

To resolve this issue, you can try one or more of the following steps:

1. Check if you are sending packets too quickly to the codec. If you are sending packets at a high rate, the codec may not be able to keep up and may return this error. You can try slowing down the rate at which you are sending packets to the codec.

2. Increase the size of the codec's internal buffers. This can be done by setting the appropriate parameters in the codec context before initializing the codec.

3. Check if the packet data is valid and correctly formatted. If the data is corrupted or not in the expected format, the codec may reject the packet and return this error.

4. Try flushing the codec's buffers by sending a NULL packet to the codec using `avcodec_send_packet()`. This can be useful if the codec's internal buffers are stuck in a state where they cannot accept any more data.

If none of these steps resolve the issue, there may be other underlying issues with your code or system configuration that are causing the error. In that case, you may need to seek further assistance or debugging support.