How to get the video codec infomation

[captainmoore]

Just like the title says，the method grabber.getVideoCodecName() can't get the info. But ffprob.exe could return the right video info.

Like this,the ffprob.exe could get the video codec and audio codec,but grabber.getVideoCodecName() return null.
How could I get the right video codec in the java program?

[saudet]

You'll need to call grabber.start() before getVideoCodecName() to get a valid value.

[captainmoore]

Thank you for your help.
Now I can get the videoCodec=27,but videCodecName=null.
I check the avcodec.class file,found that 27 represent AV_CODEC_ID_H264.
Now how can I get the videCodecName? Should I iterate the avcodec number to find the name?

[saudet]

I guess the format of that file doesn't specify a codec name...

[captainmoore]

OK,I see.. Thank you!

[saudet]

Although I don't see how this line can return null when video_c != null:
https://github.com/bytedeco/javacv/blob/master/src/main/java/org/bytedeco/javacv/FFmpegFrameGrabber.java#L475

[captainmoore]

Now I solve the problem like this...