topic Re: H.264 encoder header problem in i.MX Processors

H.264 encoder header problem

nandkishorbirad — Tue, 22 Apr 2014 05:02:19 GMT

Hi all,

I am working on i.MX53 platform on linux 2.6.35. It captures the camera feed and encodes to H.264 file format. I used mxc_vpu_test as a reference project. The problem is it doesn't play in VLC player or other than the movie player of ubuntu.

When I checked the video created by mxc_vpu_test.out, It is also having same problem. I think, this some encoder header issue.

Has anybody faced same issue & how to fix it?

the command for mxc_vpu_test is,

./mxc_vpu_test -E "-o Out.mp4 -f 2 -c 300 -w 640 -h 480"

Regards,

Nandkishor.

Re: H.264 encoder header problem

prasannakumar_m — Tue, 22 Apr 2014 08:27:53 GMT

Guess the header is not stored. Using vpu_EncGiveCommand(handle, ENC_PUT_AVC_HEADER, &hdr_sps) api with appropriate parameters will provide the headers. Write the header to the file before writing the encoded data.Sample code may be fetching the header already - try to use it.

Re: Re: H.264 encoder header problem

nandkishorbirad — Tue, 22 Apr 2014 10:41:01 GMT

Hi Prasanna,

vpu_EncGiveCommand is already used as below,

enchdr_param.headerType = SPS_RBSP;

vpu_EncGiveCommand(handle, ENC_PUT_AVC_HEADER, &enchdr_param);

vbuf = (virt_bsbuf + enchdr_param.buf - phy_bsbuf);

ret = vpu_write(enc->cmdl, (void *)vbuf, enchdr_param.size);

enchdr_param.headerType = PPS_RBSP;

vpu_EncGiveCommand(handle, ENC_PUT_AVC_HEADER, &enchdr_param);

vbuf = (virt_bsbuf + enchdr_param.buf - phy_bsbuf);

ret = vpu_write(enc->cmdl, (void *)vbuf, enchdr_param.size);

I have attached the screen-shot of video file in hex editor. (mxc_vpu_test.png) and the video file created using G-streamer (g-streamer.png),

Regards,

Nandkishor.

Re: H.264 encoder header problem

prasannakumar_m — Tue, 22 Apr 2014 11:27:25 GMT

Looks like the header is present in the vpu encoded file. There must be some other problem. Please try playing in mplayer or ffplay.

Re: H.264 encoder header problem

nandkishorbirad — Tue, 22 Apr 2014 12:40:56 GMT

Hi Prasanna,

As I mentioned earlier the video plays in movie player in ubuntu 12.04. But not in other players like VLC player.

The video file recorded using g-streamer plays in all video player.

Did you see the attached screen shot of both video files in hex editor. g-streamer video file has more informations.

Can you point out what information is missing in other video file (mxc_vpu_test.png) & how can I generate it?

Regards,

Nandkishor.

Re: H.264 encoder header problem

BrilliantovKiri — Tue, 22 Apr 2014 13:11:34 GMT

Use ffplay, Luke! :smileywink:

Re: H.264 encoder header problem

nandkishorbirad — Wed, 23 Apr 2014 08:12:46 GMT

Hi Kirill,

The encoded video file should play in common video players. This is the primary requirement, I can't suggest user to use some specific player.

Re: H.264 encoder header problem

BrilliantovKiri — Wed, 23 Apr 2014 09:39:41 GMT

For this you should add video frames in container, e.g. avi.

Re: H.264 encoder header problem

joanxie — Fri, 25 Apr 2014 08:52:32 GMT

as I mentioned in the SR, I send the link to you, try to change the raw data to mp4 file first, hope that helpful for you.

Re: H.264 encoder header problem

YixingKong — Fri, 20 Jun 2014 03:36:10 GMT

Nandkishor

Had your issue got resolved? If yes, we are going to close the discussion in 3 days. If you still need help, please feel free to reply with an update to this discussion.

Thanks,

Yixing

Re: H.264 encoder header problem

YixingKong — Thu, 03 Jul 2014 08:00:27 GMT

Nandkishor

This discussion is closed since no activity. If you still need help, please feel free to reply with an update to this discussion, or create another discussion.

Thanks,

Yixing