FFmpeg av_read_frame和最大数据包大小

Question

是否有可能检测到av_read_frame（）可以读取的最大数据包（AVpacket）大小？

Answer 1

I was looking for the same recently. It appears that av_read_frame internally calls a codec specific read_packet function for each codec/format. This in turns allocate memory per packet and frees it depending on the maximum limits that the codec/format poses. So as long as you have memory to support the (in)valid stream you should be fine and the limits are specific to the codec/format decoders. [YOu can find the function defined in AVInputFormat for each format as .read_packet ].