Hello! First of all - Thank for advices about with make my bitrate lower - it helps! //Again, we'd recommend to reconfigure codec params (bitrate, framerate, sdp fmtp, etc) using this API instead of changing the library code, this is for your own sake :), e.g: avoid complexity of conflict-resolving/re-patching when updating pjsip version. ok-ok :-) I understand. I'll try to follow your advice in future. Now I'm in state of exploring PJSIP and it's configuration, so sometimes I have not enought time to do changes in complex. >About quality on the screen shots, it seems to be packet loss issue. >Well, when I mentioned about increasing bitrate, I thought the problem >was picture sharpness. Note that increasing bitrate may increase the >packet loss rate. So perhaps try to re-adjust the bitrate (decrease it >this time:) until achieving acceptable balance of packet loss rate & >picture sharpness. Further potential solution will be find a lower >(and acceptable ofc) video resolution in the sender, so bitrate can be >lowered (to minimize packet loss). from the end: I will not reduce my stream resolution. My target resolution is Full HD :-) but I can decrease the frame rate to 5 FPS, maybe even 3 FPS. so bitrate should be appropriate. We experimented with ffmpeg encoder context (line 1158 file, ffmpeg_codecs.c). And found smtn interesting: 1. value ff->enc_ctx->gop_size in range 5-15 make sharpness quite well. But in this case we have to increase bitrate in times (for resolution 800x600, without gop, optimal bitrate is 375-750 kbps. With gop bitrate should be 800-1600 kbps). Using GOP causes decreasing sharpness. Increasing bitrate with GOP causes frame lose :-) I prepared some images with GOP: http://www.freeimagehosting.net/t3gy9 without GOP: http://www.freeimagehosting.net/b32wg 2. value ff->enc_ctx->me_method in range (0-10). I experimented with it, but without some success. Should I use with me_method some other additional settings? 3. As I see under debug - we use ctx->profile as PROFILE_H264_BASELINE. As Far As I Know - it is normal settings for encoder. But as alternative we have only PROFILE_H264_MAIN, as additional profile. How can I make this enum of profiles more wide for experiments? 4. As I can see: we have encoder settings for send stream from web cam, when we neglect some details. When I try to send video frames with desktop images - configure sharpness not satisfy me. How can I increase sharpness, by configuring ffmpeg encoder? 5. maybe exists some enum of configuration for ffmpeg for desktop streaming? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20120301/82ba5613/attachment.html>
