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<div class="moz-cite-prefix">Finnaly i was able to set up timing
data in h264 stream.<br>
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).<br>
PTS of every NAL unit is different exactly by 40000 (sometimes
40001).<br>
What am i doing wrong?<br>
<br>
Input #0, hisi, from '/dev/video':<br>
Duration: N/A, start: 895789.311044, bitrate: N/A<br>
Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709,
progressive), 1920x1080, 25 fps, 25 tbr, 90k tbn, 50 tbc<br>
File 'out.mkv' already exists. Overwrite ? [y/N] getchnattr worksy<br>
Output #0, matroska, to 'out.mkv':<br>
Metadata:<br>
encoder : Lavf57.83.100<br>
Stream #0:0: Video: h264 (Main) (H264 / 0x34363248),
yuvj420p(pc, bt709, progressive), 1920x1080, q=2-31, 25 fps, 25
tbr, 1k tbn, 90k tbc<br>
Stream mapping:<br>
Stream #0:0 -> #0:0 (copy)<br>
Press [q] to stop, [?] for help<br>
[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.<br>
[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.<br>
[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.<br>
[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.<br>
[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.<br>
[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.<br>
frame= 24 fps=3.5 q=-1.0 Lsize= 94kB time=00:00:07.15
bitrate= 107.6kbits/s speed=1.04x<br>
video:93kB audio:0kB subtitle:0kB other streams:0kB global
headers:0kB muxing overhead: 0.929940%<br>
<br>
Marcin<br>
<br>
<br>
W dniu 04.02.2018 o 16:24, Marcin Woźniak pisze:<br>
</div>
<blockquote cite="mid:5A7725B9.1030703@intermania.pl" type="cite">Hello,
<br>
I try to implement an HiSilicon H264 encoder direct input as
ffmpeg libavdevice source (someking like V4L linux for cameras
with H264 source driver).
<br>
I successfully recieve H264 packets with NAL units and set correct
PTS according to source packet.
<br>
I am stuck at the moment where timing data is not extracted from
raw H264 paassed data and looks like this:
<br>
<br>
Input #0, armdevice, from '/dev/video':
<br>
Duration: N/A, start: 0.000000, bitrate: N/A
<br>
Stream #0:0: Video: h264 (High), yuvj420p(pc, bt709,
progressive), 1920x1080, 1000k tbr, 1000k tbn, 2000k tbc
<br>
<br>
Resolution is okay but timing data is wrong. I passed SPS and PPS
of incomming data in "read_packet".
<br>
<br>
In shotcut:
<br>
1. Open H264 encoder using low-level API in device_open
<br>
2. Initialize encoder with fps and resolution using API in
device_init
<br>
3. In read_packet i get NAL units from buffer and:
<br>
av_new_packet(pkt,total);
<br>
memcpy(pkt->data,buffer) -> stub
<br>
pkt->pts = buffer.u64PTS;
<br>
pkt->size = size
<br>
and return packet.
<br>
<br>
Profile level is guessed okay but not the timing data.
<br>
<br>
What am i doing wrong?
<br>
Marcin
<br>
<br>
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<br>
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