Finnaly i was able to set up timing data in h264 stream.Trying to save this as -f test.h264 produces good file, trying to mux it drops FPS to tenth of original (25 fps becomes 2.5 fps and bitrate from 1024 kb/s to little more than 100 kbs).
PTS of every NAL unit is different exactly by 40000 (sometimes 40001). What am i doing wrong?
Input #0, hisi, from '/dev/video': Duration: N/A, start: 895789.311044, bitrate: N/AStream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 1920x1080, 25 fps, 25 tbr, 90k tbn, 50 tbc
File 'out.mkv' already exists. Overwrite ? [y/N] getchnattr worksy
Output #0, matroska, to 'out.mkv':
Metadata:
encoder : Lavf57.83.100
Stream #0:0: Video: h264 (Main) (H264 / 0x34363248), yuvj420p(pc,
bt709, progressive), 1920x1080, q=2-31, 25 fps, 25 tbr, 1k tbn, 90k tbc
Stream mapping: Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help[matroska @ 0x1a1c4b0] Non-monotonous DTS in output stream 0:0; previous: 0, current: -2627; changing to 0. This may result in incorrect timestamps in the output file. [matroska @ 0x1a1c4b0] Non-monotonous DTS in output stream 0:0; previous: 0, current: -2182; changing to 0. This may result in incorrect timestamps in the output file. [matroska @ 0x1a1c4b0] Non-monotonous DTS in output stream 0:0; previous: 0, current: -1738; changing to 0. This may result in incorrect timestamps in the output file. [matroska @ 0x1a1c4b0] Non-monotonous DTS in output stream 0:0; previous: 0, current: -1293; changing to 0. This may result in incorrect timestamps in the output file. [matroska @ 0x1a1c4b0] Non-monotonous DTS in output stream 0:0; previous: 0, current: -849; changing to 0. This may result in incorrect timestamps in the output file. [matroska @ 0x1a1c4b0] Non-monotonous DTS in output stream 0:0; previous: 0, current: -404; changing to 0. This may result in incorrect timestamps in the output file. frame= 24 fps=3.5 q=-1.0 Lsize= 94kB time=00:00:07.15 bitrate= 107.6kbits/s speed=1.04x video:93kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.929940%
Marcin W dniu 04.02.2018 o 16:24, Marcin Woźniak pisze:
Hello,I try to implement an HiSilicon H264 encoder direct input as ffmpeg libavdevice source (someking like V4L linux for cameras with H264 source driver). I successfully recieve H264 packets with NAL units and set correct PTS according to source packet. I am stuck at the moment where timing data is not extracted from raw H264 paassed data and looks like this:Input #0, armdevice, from '/dev/video': Duration: N/A, start: 0.000000, bitrate: N/AStream #0:0: Video: h264 (High), yuvj420p(pc, bt709, progressive), 1920x1080, 1000k tbr, 1000k tbn, 2000k tbcResolution is okay but timing data is wrong. I passed SPS and PPS of incomming data in "read_packet".In shotcut: 1. Open H264 encoder using low-level API in device_open 2. Initialize encoder with fps and resolution using API in device_init 3. In read_packet i get NAL units from buffer and: av_new_packet(pkt,total); memcpy(pkt->data,buffer) -> stub pkt->pts = buffer.u64PTS; pkt->size = size and return packet. Profile level is guessed okay but not the timing data. What am i doing wrong? Marcin _______________________________________________ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
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