On Tue, 14 Feb 2017 12:32:07 +0000 Yogender Gupta <ygu...@nvidia.com> wrote:
> Hi Miroslav , Philip, > > We will look at this issue, and provide a fix for the same. Would be > great to send me and Sumit (also copied here) the command lines that > you tried and the observations to repro at our end. Here's the sample from Miroslav - I've stuck it on dropbox. https://www.dropbox.com/s/1bjyhdzcuv1y357/dvb_mpegts_720x576_sar_nvenc.ts?dl=0 Here is the ffprobe report and the command line: > >>> INPUT: Stream #0:0[0x401]: Video: mpeg2video (Main) > >>> ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 720x576 [SAR > >>> 64:45 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc > >>> > >>> OUTPUT: Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / > >>> 0x001B), yuv420p(progressive), 720x576 [SAR 16:11 DAR 20:11], 25 > >>> fps, 25 tbr, 90k tbn, 50 tbc > >>> > >>> COMMAND: ffmpeg -deint adaptive -hwaccel cuvid -c:v mpeg2_cuvid > >>> -i "in.ts" -y -c:v h264_nvenc -c:a copy -b:v 1M -preset hq -f > >>> mpegts "out.ts" and for completeness, Miroslav's analysis: > I am sure that i know what is going on, NVENC is inserting wrong SPS > VUI aspect_ratio_idc to h264 packets when you encode at resolution > 720x576 and 720x480 > > AR 16:9 will insert aspect_ratio_idc=4 but it should be > aspect_ratio_idc=255, sar_width=64, sar_height=45 for 720x576 AR 4:3 > will insert aspect_ratio_idc=2 but it should be aspect_ratio_idc=255, > sar_width=16, sar_height=15 for 720x576 > > MP4 and MKV containers contains correct AR metadata information which > all players should accept, but TS container has nothing like that so > it relies on what is inside h264 SPS. --phil _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
