No matter what library/SDK to use, I want to convert from avi to asf very quickly (I could even sacrifice some quality of video and audio). I am working on Windows platform (Vista and 2008 Server), better .Net SDK/code, C++ code is also fine. :-)
I learned from the below link, that there could be a very quick way to convert from avi to asf to support streaming better, as mentioned "could convert the video from AVI to ASF format using a simple copy (i.e. the content is the same, but container changes).". My question is after some hours of study and trial various SDK/tools, as a newbie, I do not know how to begin with so I am asking for reference sample code to do this task. :-)
(as this is a different issue, we decide to start a new topic. :-) )
Issue with streaming AVI files
thanks in advance,
George
EDIT 1:
I have tried to get the binary of ffmpeg from,
http://ffmpeg.arrozcru.org/autobuilds/ffmpeg-latest-mingw32-static.tar.bz2
then run the following command,
C:\software\ffmpeg-latest-mingw32-static\bin>ffmpeg.exe -i test.avi -acodec copy
-vcodec copy test.asf
FFmpeg version SVN-r18506, Copyright (c) 2000-2009 Fabrice Bellard, et al.
configuration: --enable-memalign-hack --prefix=/mingw --cross-prefix=i686-ming
w32- --cc=ccache-i686-mingw32-gcc --target-os=mingw32 --arch=i686 --cpu=i686 --e
nable-avisynth --enable-gpl --enable-zlib --enable-bzlib --enable-libgsm --enabl
e-libfaac --enable-pthreads --enable-libvorbis --enable-libmp3lame --enable-libo
penjpeg --enable-libtheora --enable-libspeex --enable-libxvid --enable-libfaad -
-enable-libschroedinger --enable-libx264
libavutil 50. 3. 0 / 50. 3. 0
libavcodec 52.25. 0 / 52.25. 0
libavformat 52.32. 0 / 52.32. 0
libavdevice 52. 2. 0 / 52. 2. 0
libswscale 0. 7. 1 / 0. 7. 1
built on Apr 14 2009 04:04:47, gcc: 4.2.4
Input #0, avi, from 'test.avi':
Duration: 00:00:44.86, start: 0.000000, bitrate: 5291 kb/s
Stream #0.0: Video: msvideo1, rgb555le, 1280x1024, 5 tbr, 5 tbn, 5 tbc
Stream #0.1: Audio: pcm_s16le, 22050 Hz, mono, s16, 352 kb/s
Output #0, asf, to 'test.asf':
Stream #0.0: Video: CRAM / 0x4D415243, rgb555le, 1280x1024, q=2-31, 1k tbn,
5 tbc
Stream #0.1: Audio: pcm_s16le, 22050 Hz, mono, s16, 352 kb/s
Stream mapping:
Stream #0.0 -> #0.0
Stream #0.1 -> #0.1
Press [q] to stop encoding
frame= 224 fps=222 q=-1.0 Lsize= 29426kB time=44.80 bitrate=5380.7kbits/s
video:26910kB audio:1932kB global headers:0kB muxing overhead 2.023317%
C:\software\ffmpeg-latest-mingw32-static\bin>
http://www.microsoft.com/windows/windowsmedia/player/webhelp/default.aspx?&mpver=11.0.6001.7000&id=C00D11B1&contextid=230&originalid=C00D36E6
then have the following error when using Windows Media Player to play it, does anyone have any ideas?
http://www.microsoft.com/windows/windowsmedia/player/webhelp/default.aspx?&mpver=11.0.6001.7000&id=C00D11B1&contextid=230&originalid=C00D36E6
Maybe you could use FFMPEG and run a command like this (I haven't tried):
ffmpeg.exe -i test.avi -acodec copy -vcodec copy test.asf
Related
I am running one of the oneVPL samples- hello-vpp.
I've downloaded the samples source code from oneAPI samples repository-
https://github.com/oneapi-src/oneAPI-samples.git
My OS is Ubuntu 18.04.
After build, I tried the below command to get the output.
./hello-vpp ../content/input.i420 640 480
and I got the below error.
Could not create output file
Processed 0 frames
Any corrections in my command? What would be the expected output?
VPP sample only works with i420 video format and it's size must be 128x96. So the right command to run hello-vpp sample is:
./hello-vpp ../content/input.i420 128x96
The expected output would be
Found ApiVersion: 2.2
SW session created
Processing ../content/input.i420 -> out.i420
Processed 60 frames
The output file i.e. out.i420 would be found in the build directory(Path: "\Libraries\oneVPL\hello-vpp\build") and its size is 640x480 by default.
I am trying to set the fps of the coral mipi camera to 60fps. From the datasheet, it says it can run 720p at 60fps so i know the camera is capable.
I have set the resolution using the following command which works.
v4l2-ctl --device=/dev/video1 --set-fmt-video=width=1280,height=720
but when I set the fps to 60, the max limit seem to be 30.
mendel#mocha-calf:~$ v4l2-ctl --device=/dev/video1 -p 60
Frame rate set to 30.000 fps
There are no option to set exposure or gain. Would I have to rebuild the driver to be able to have these options?
Regards
Paul
60 FPS not supported. Please see the supported formats below.
mendel#tuned-rabbit:~$ v4l2-ctl --list-formats-ext
ioctl: VIDIOC_ENUM_FMT
Type: Video Capture
[0]: 'YUYV' (YUYV 4:2:2)
Size: Discrete 640x480
Interval: Discrete 0.033s (30.000 fps)
Size: Discrete 720x480
Interval: Discrete 0.033s (30.000 fps)
Size: Discrete 1280x720
Interval: Discrete 0.033s (30.000 fps)
Size: Discrete 1920
And for changing/setting exposure and gain, you may need to make modifications in the current driver code and rebuild the kernel image. Driver code can be found at:
https://coral.googlesource.com/linux-imx/+/refs/heads/master/drivers/media/platform/mxc/capture/ov5645_mipi_v2.c#2774
And instructions to build the kernel image can be seen at : https://coral.googlesource.com/docs/+/refs/heads/master/GettingStarted.md
I'm reading an avi file with approx 2MB size, 301 frames, 20 frames/sec (15 sec long video) and a size of 1024 * 1096 per frame.
When I'm reading the single frames with cv2 and resaving them in original size as png, then I'm getting a size of approx 600KB per picture/frame. So, I have in total 301 * 600KB = 181MB (original avi had 2MB).
Any idea why this is happening and how to reduce the file size of the single frames without changing the resolution? Idea is to somehow generate single frames from the original video, do detections with CNN and to resave the original video again with included detections and the output video shall be somehow very similar to input video (approx same file size, must not be avi format)
PNG files or single frames are in the most cases always larger than the original video file (compressed in the most cases by a codec https://www.fourcc.org/codecs.php). Use for example the following command on Linux to create a compressed avi:
ffmpeg -i FramePicName%d.png -vcodec libx264 -f avi aviFileName
You can get the used codec to create the original video file by the following python cv2 code
cap = cv2.VideoCapture(videoFile)
fourcc = cap.get(cv2.CAP_PROP_FOURCC) # or cv2.cv.CV_CAP_PROP_FOURCC
"".join([chr((int(fourcc) >> 8 * i) & 0xFF) for i in range(4)])
My source video file (1h 30min movie) is playable in both PotPlayer and VLC: h264, 8-bit color and 7755kb/s bitrate.
The NVEnc command I'm using is this:
.\nvencc\NVEncC64.exe --avhw -i "input.mkv" --codec hevc --preset quality --bframes 4 --ref 7 --cu-max 32 --cu-min 8 --output-depth 10 --audio-copy --sub-copy -o "output.mkv"
Encoding works fine (I believe):
NVEncC (x64) 5.26 (r1786) by rigaya, Jan 31 2021 09:23:04 (VC 1928/Win/avx2)
OS Version Windows 10 x64 (19042)
CPU AMD Ryzen 5 1600 Six-Core Processor [3.79GHz] (6C/12T)
GPU #0: GeForce GTX 1660 (1408 cores, 1830 MHz)[PCIe3x16][457.51]
NVENC / CUDA NVENC API 11.0, CUDA 11.1, schedule mode: auto
Input Buffers CUDA, 21 frames
Input Info avcuvid: H.264/AVC, 1920x800, 24000/1001 fps
AVSync vfr
Vpp Filters cspconv(nv12 -> p010)
Output Info H.265/HEVC main10 # Level auto
1920x800p 1:1 23.976fps (24000/1001fps)
avwriter: hevc, eac3, subtitle#1 => matroska
Encoder Preset quality
Rate Control CQP I:20 P:23 B:25
Lookahead off
GOP length 240 frames
B frames 4 frames [ref mode: disabled]
Ref frames 7 frames, MultiRef L0:auto L1:auto
AQ off
CU max / min 32 / 8
Others mv:auto
encoded 142592 frames, 219.97 fps, 1549.90 kbps, 1098.83 MB
encode time 0:10:48, CPU: 8.7%, GPU: 5.2%, VE: 98.3%, VD: 21.5%, GPUClock: 1966MHz, VEClock: 1816MHz
frame type IDR 595
frame type I 595, avgQP 20.00, total size 39.44 MB
frame type P 28519, avgQP 23.00, total size 471.93 MB
frame type B 113478, avgQP 25.00, total size 587.45 MB
but when I try to play it in either PotPlayer or VLC it says there is no video track or it just doesn't play at all.
MediaInfo also doesn't show any video, audio, or subtitle tracks either, just the name of the file and the file size. Am I missing something?
Switching --avhw to --avsw solved the problem.
I am running IP Webcam on Android which provides an mpjpeg video stream. I have to limit the capture frame rate to 5fps to save on battery.
However ffmpeg will still detect the input stream to be 25 fps, which causes it to be saved in the wrong speed causing timestamps and audio to be desynchronized.
Input #0, mpjpeg, from 'https://***:***#smarthome:8080/video':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1280x720 [SAR 1:1 DAR 16:9], 25 tbr, 25 tbn, 25 tbc
Input #1, ogg, from 'https://***:***#smarthome:8080/audio.opus':
Duration: N/A, start: 0.006500, bitrate: N/A
Stream #1:0: Audio: opus, 48000 Hz, mono, fltp
Metadata:
ENCODER : Lavf58.12.100
[stream_segment,ssegment # 0x19b49a0] Opening '/mnt/nas/SecurityCamera/2020-06-20_14-26-04.mkv' for writing
Output #0, stream_segment,ssegment, to '/mnt/nas/SecurityCamera/%Y-%m-%d_%H-%M-%S.mkv':
Metadata:
encoder : Lavf58.20.100
Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 25 tbr, 1k tbn, 25 tbc
Stream #0:1: Audio: opus, 48000 Hz, mono, fltp
Metadata:
ENCODER : Lavf58.12.100
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #1:0 -> #0:1 (copy)
Press [q] to stop, [?] for help
[ogg # 0x1753e00] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
frame= 8 fps=7.9 q=-1.0 size=N/A time=00:00:00.49 bitrate=N/A speed=0.489x
As you can see it detects Input #0 to be 25 tbr, 25 tbn, 25 tbc which results in an expected 25 fps, however the fps (shown high right now but it slowly approaching 5fps) is way below 25 which causes the speed to be <1x.
I have tried to use -r 5 -i ... and -vsync 2 and different values for -enc_time_base none of which had any impact. From https://trac.ffmpeg.org/ticket/403 I've learned that -r only works on inputs with unknown fps. But my input doesn't have unknown fps, it has the wrong fps.
Is there any way to force overwrite the input fps so that I can get a proper speed of 1x and synchronized timestamps and audio?