* update faq

Author: lxowalle

docs/doc/en/faq.md

@@ -322,4 +322,9 @@ Additionally, if you just want to save a single page for offline viewing, you ca
 
 ## When recording is set to non-blocking mode, no audio data is captured
 
-When recording in non-blocking mode on MaixCam2, after starting recording, you need to wait for the audio data preparation to complete before being able to obtain the data. Therefore, there should be an interval between two recording operations. For example, if you need to record 60ms of audio data, you can call the recording function again every 50ms.
+When recording in non-blocking mode on MaixCam2, after starting recording, you need to wait for the audio data preparation to complete before being able to obtain the data. Therefore, there should be an interval between two recording operations. For example, if you need to record 60ms of audio data, you can call the recording function again every 50ms.
+
+## The video cannot be decoded, or an error is reported during the decoding process
+
+1. Ensure the video file format is h264 or mp4
+2. If the error persists, try removing the B-frames from the video, keeping only I-frames and P-frames, and then attempt again. You can use the ffmpeg to achieve this: `ffmpeg -i input.mp4 -c:v libx264 -x264-params "bframes=0" output_no_b_frames.mp4`

docs/doc/zh/faq.md

@@ -303,4 +303,9 @@ MaixCAM 自带的**相机**应用拍摄的照片和视频可以在自带的**相
 
 ## 录音时设置为非阻塞模式后, 录音没有数据
 
-MaixCam2在非阻塞模式下录音时, 开始录音后需要等待录音数据准备完成后才能拿到数据。因此两次录音之间需要间隔一段时间. 比如如果需要录入60ms的录音数据, 可以每50ms再调用一次录音函数.
+MaixCam2在非阻塞模式下录音时, 开始录音后需要等待录音数据准备完成后才能拿到数据。因此两次录音之间需要间隔一段时间. 比如如果需要录入60ms的录音数据, 可以每50ms再调用一次录音函数.
+
+## 视频无法解码, 或者在解码过程中提示出错
+
+1. 确保视频文件格式是`h264`或者`mp4`
+2. 如果仍然报错, 尝试将删除视频中的B帧,只保留I帧和P帧后再次尝试. 可以使用ffmpeg 命令行工具实现: `ffmpeg -i input.mp4 -c:v libx264 -x264-params "bframes=0" output_no_b_frames.mp4`