Black border at the video output after H.264 encoding

Akhil Narayanan

Other Parts Discussed in Thread: TVP5146M2

I am using custom DM368 hardware and TVP5146M2 analog decoder to convert analog NTSC video input to digital.(720X480)
After H.264 encoding I see black border at the right of the video, after doing a bit of search found it was because of padding(736X480).
How to remove the black border at the output video.

Below is the pipeline I am using:
gst-launch -v v4l2src always-copy=FALSE input-src=composite ! "video/x-raw-yuv,format=(fourcc)NV12,width=720,height=480,pitch=736" !
dmaiaccel ! dmaienc_h264 targetbitrate=800000 ! dmaiperf print-arm-load=true ! rtph264pay ! udpsink host=192.168.1.15 port=3000 sync=false

over 11 years ago

0 Veeranna Hanchinal over 11 years ago

TI__Expert 8465 points

I guess you might be passing wrong buffer pointer to encoder. what is padding at left side and right side? is it 8 each side?. You might be missing something when you converting buffer pointer.

Please check input YUV buffer before calling process call.

0 Akhil Narayanan over 11 years ago in reply to Veeranna Hanchinal

Prodigy 140 points

thanks for your reply.

it is 4 pixels at the left and 12 pixels at the right.

I have captured raw image (UYVY 422)see attached.

the pipeline used to capture:

gst-launch -v v4l2src always-copy=FALSE input-src=composite num-buffers=1 chain-ipipe=false ! filesink location=snapshot.uyvy

0 Veeranna Hanchinal over 11 years ago in reply to Akhil Narayanan

TI__Expert 8465 points

In this case please check inbuf ptr. It should 4pixel offset of raw padded YUV buffer. It may happening that, left side you are loosing 4 pixel columns and you are getting 4 pixel column extra at right side of the video.

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Black border at the video output after H.264 encoding