1080i live input transcode issue

[JasonP]

Hi,

I am facing issues with transcoding 1080i input from network. My pipeline is
like following

gst-launch-1.0 udpsrc port=<input port> ! decodebin ! deinterlace mode=0
fields=1 method=4 tff=0 ! videobox ! videoconvert ! videoscale ! x264enc !
mpegtsmux ! filesink location=file.ts

I am receiving 1080i live input through udp port. And I am transcoding the
stream using above pipeline. I am also tapping the yuv in video decode
element. Both tapped yuv as well as output TS file have major issues like
patches and green stripes in the video. If I run the same pipeline without
encoder component(see below given pipeline) I don't see a single issue in
the tapped yuv and filesink output. 

gst-launch-1.0 udpsrc port=<input port> ! decodebin ! deinterlace mode=0
fields=1 method=4 tff=0 ! videobox ! videoconvert ! videoscale ! filesink
location=file.yuv

Can anybody be help me to understand how the encoder element affects the
decoding in the pipeline? What is the cause for this issue and how can I
resolve this.? Are there any patches available for this?

Stream details:

Format                                   : MPEG-TS
Overall bit rate                         : 8 237 Kbps

VIDEO
-------------------------------------------------------
ID                                       : 1002 (0x3EA)
Menu ID                                  : 1200 (0x4B0)
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format version                           : Version 2
Format profile                           : Main at L4.0
Format settings, CABAC                   : Yes
Format settings, ReFrames                : 4 frames
Codec ID                                 : 27
Bit rate                                 : 7 312 Kbps
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate                               : 25.000 fps
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Interlaced
Scan order                               : Top Field First
Bits/(Pixel*Frame)                       : 0.141
Color primaries                          : BT.709-5, BT.1361, IEC 61966-2-4,
SMPTE RP177
Transfer characteristics                 : BT.709-5, BT.1361
Matrix coefficients                      : BT.709-5, BT.1361, IEC 61966-2-4
709, SMPTE RP177

Audio #1
-------------------------------------------------------
ID                                       : 1003 (0x3EB)
Menu ID                                  : 1200 (0x4B0)
Format                                   : MPEG Audio
Format version                           : Version 1
Format profile                           : Layer 2
Codec ID                                 : 4
Bit rate mode                            : Constant
Bit rate                                 : 128 Kbps
Channel(s)                               : 2 channels
Sampling rate                            : 48.0 KHz
Compression mode                         : Lossy
Delay relative to video                  : -630ms
Language                                 : English

Audio #2
-------------------------------------------------------
ID                                       : 1004 (0x3EC)
Menu ID                                  : 1200 (0x4B0)
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Format profile                           : Layer 2
Mode extension                           : ME (music and effects)
Format settings, Endianness              : Big
Codec ID                                 : 6
Bit rate mode                            : Constant
Bit rate                                 : 384 Kbps
Channel(s)                               : 6 channels
Channel positions                        : Front: L C R, Side: L R, LFE
Sampling rate                            : 48.0 KHz
Bit depth                                : 16 bits
Compression mode                         : Lossy
Delay relative to video                  : -781ms
Stream size                              : 4.65 MiB (5%)
Language                                 : Hindi

Thanks in advance.
JasonP



-----
Jason p
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