On Thu, Oct 27, 2011 at 14:16, Hema A <[email protected]> wrote: > To add on, currently the image that is streamed in PIX_FMT_RGBA format is > not clear. It has green strips and we can observe the frames very faintly in > the background.
it could happen that the RGBA label was given by mistake. Try to look at the frames as if they were YUV420P. Alex > Thanks, > Hema > On Thu, Oct 27, 2011 at 5:20 PM, Hema A <[email protected]> wrote: >> >> Hi, >> >> I am trying to stream a YUV file whose pix format is PIX_FMT_RGBA >> >> , to a VLC player. I use H264 codec for encoding using FFMPEG. Earlier i >> had used YUV file with PIX_FMT_YUV420P format and i could successfully >> stream the YUV video with the same source implementation. Can anybody let me >> know if the below code needs any additional change for encoding a YUV file >> in RGBA format and does VLC player support playing such files? >> >> I have specified the following in the code; >> >> //Allocate codec context >> >> codec = avcodec_find_encoder(CODEC_ID_ >> >> H264); >> >> c = mpegtsstream->codec; >> >> //c->profile= FF_PROFILE_H264_BASELINE; >> >> c >> >> ->coder_type=FF_CODER_TYPE_VLC; >> >> c->bit_rate = 400000; >> >> c->width = >> >> 480 >> >> c->height = >> >> 800 >> >> c->time_base= (AVRational){1,10}; //frames per second >> >> c->gop_size = 250; /* emit one intra frame every 250 frames */ >> >> c >> >> ->max_b_frames=0; >> >> c->pix_fmt = PIX_FMT_ >> >> RGBA; >> >> c->me_range = 16; >> >> c->max_qdiff = 4; >> >> c >> >> ->qmin = 10; >> >> c->qmax = 35; >> >> c->qcompress = 0.3; >> >> a >> >> vcodec_open(c, codec); >> Created >> AVFrame, filled the raw data from the YUV file into AVPicture... >> >> frame = avcodec_alloc_frame(); >> >> n >> >> umBytes = avpicture_get_size(PIX_FMT_RGBA, c->width, c->height); >> buffer = (uint8_t *)av_malloc(numBytes*sizeof(uint8_t)); >> . >> .. >> ... >> >> for(;;) >> { >> >> sizein = fread(buffer, 1, numBytes, f); >> >> ... >> >> ... >> >> avpicture_fill((AVPicture*)frame, buffer, PIX_FMT_ >> >> RGBA, c->width, c->height); >> >> frame->interlaced_frame = 1; //if wanted and in video parameters defined >> >> frame->top_field_first = 1; >> >> fd->framebuf_size = avcodec_encode_video(c, fd->frame_buffer, numBytes, >> frame); >> >> The encoded buffer will be encapsulted with Mpeg-ts and RTP protocol, and >> streamed to the VLC player. I have used >> >> av_interleaved_write_frame() for writing the frames into Mpeg-ts and RTP >> context. >> Thanks in advance, >> Hema > > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user > > _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
