AV_read_frame hang 住

来源：9-10 实战从视频设备上采集数据2

heaven强

2021-01-05

图片描述在av_read_frame 的时候直接卡住，程序不死机，但是也不退出这个函数，阻塞状态，这应该怎么查原因？

写回答

1回答

heaven强

提问者

2021-01-05

感谢老师这个问题解决了，但是视频播放太快，使用的播放命令

ffplay -s 640x480 -pix_fmt yuyv422 -framerate 30 video_test.yuv

以下是录制时候的信息

[video4linux2,v4l2 @ 0x7f6d34000cc0] fd:19 capabilities:84a00001
[video4linux2,v4l2 @ 0x7f6d34000cc0] Current input_channel: 0, input_name: Camera 1, input_std: 0
[video4linux2,v4l2 @ 0x7f6d34000cc0] The V4L2 driver changed the pixel format from 0x32315559 to 0x56595559
[video4linux2,v4l2 @ 0x7f6d34000cc0] Trying to set codec:rawvideo pix_fmt:yuv420p
[video4linux2,v4l2 @ 0x7f6d34000cc0] The V4L2 driver changed the pixel format from 0x32315559 to 0x56595559
[video4linux2,v4l2 @ 0x7f6d34000cc0] Trying to set codec:rawvideo pix_fmt:yuv420p
[video4linux2,v4l2 @ 0x7f6d34000cc0] The V4L2 driver changed the pixel format from 0x32315659 to 0x56595559
[video4linux2,v4l2 @ 0x7f6d34000cc0] Trying to set codec:rawvideo pix_fmt:yuv422p
[video4linux2,v4l2 @ 0x7f6d34000cc0] The V4L2 driver changed the pixel format from 0x50323234 to 0x56595559
[video4linux2,v4l2 @ 0x7f6d34000cc0] Trying to set codec:rawvideo pix_fmt:yuyv422
[video4linux2,v4l2 @ 0x7f6d34000cc0] Setting time per frame to 1/30