roykim
January 24, 2021, 2:55pm
1
Hello,
I’m trying to transfer video from v4l2src(tc358840) using gstreamer, but I got the below message from FFmpeg while I was trying to send 60fps video.
Stream #0:0: Video: h264 (Constrained Baseline) ([7][0][0][0] / 0x0007), yuv420p(progressive), 1280x720, q=2-31, 60 fps, 47 tbr , 1k tbn, 1k tbc
So I tried to checked testvideosrc, and it’s ok like below.
Stream #0:0: Video: h264 (Constrained Baseline) ([7][0][0][0] / 0x0007), yuv420p(progressive), 1280x720, q=2-31, 60 fps, 60 tbr, 1k tbn, 1k tbc
In this case, I cannot get a right video due to the wrong tbr number. I think players seems detecting the frame rate as tbr number, not fps number, so the video I sent is played in wrong speed.
In addition, with 30fps video, I got the same tbr number, 47 tbr. I’m checking this on nano with version 32.3.1.
Hi,47 tbr and 60 tbr cases. And is the information put in VUI? Would like to know which item is parsed as tbr .
roykim
January 25, 2021, 10:27am
4
Hi,
The command I used is complicated a bit lik below. I send streams to rtmp from v4l2src using gstreamer.
ffmpeg -fflags nobuffer -i rtmp://dev.tbond.telelian.com/live/4922c3bff6a1 -c copy -f null -
So I share the simple command you can use instead as below. It returns 1000k tbr instead of 47 tbr in the same environment.
ffprobe /dev/video0 #0: not enough frames to estimate rate; consider increasing probesize#0 , video4linux2,v4l2, from ‘/dev/video0’:#0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 1920x1080, 1000k tbr , 1000k tbn, 1000k tbc
Would like to know which item is parsed as tbr .
I am not so sure what tbr means, but please refer to the link →
Hi,
nvidia@nvidia-desktop:~/jetson_multimedia_api/samples/01_video_encode$ ./video_encode 1080.yuv 1920 1080 H264 out.h264 --insert-vui -fps 19 1
Creating Encoder in blocking mode
Opening in BLOCKING MODE
NvMMLiteOpen : Block : BlockType = 4
===== NVMEDIA: NVENC =====
NvMMLiteBlockCreate : Block : BlockType = 4
875967048
842091865
H264: Profile = 66, Level = 51
Could not read complete frame from input file
File read complete.
Got 0 size buffer in capture
App run was successful
nvidia@nvidia-desktop:~/jetson_multimedia_api/samples/01_video_encode$ ffprobe -i out.h264
ffprobe version 3.4.8-0ubuntu0.2 Copyright (c) 2007-2020 the FFmpeg developers
built with gcc 7 (Ubuntu/Linaro 7.5.0-3ubuntu1~18.04)
configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/aarch64-linux-gnu --incdir=/usr/include/aarch64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
libavutil 55. 78.100 / 55. 78.100
libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100
libavdevice 57. 10.100 / 57. 10.100
libavfilter 6.107.100 / 6.107.100
libavresample 3. 7. 0 / 3. 7. 0
libswscale 4. 8.100 / 4. 8.100
libswresample 2. 9.100 / 2. 9.100
libpostproc 54. 7.100 / 54. 7.100
Input #0, h264, from 'out.h264':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: h264 (Constrained Baseline), yuv420p(tv, bt470bg/reserved/reserved, progressive), 1920x1080, 19 fps, 19 tbr, 1200k tbn, 38 tbc
We try on JP4.4.1(r32.4.4).