92 questions
- Bountied 0
- Unanswered
- Frequent
- Score
- Trending
- Week
- Month
- Unanswered (my tags)
0
votes
0
answers
132
views
ReedSolo error correction codec with bitstream as input
Does anyone know where to find open source code for a ReedSolo encoder that uses a binary bitstream as input? Preferably a Python project。
The open source projects I have found so far all use the ...
-1
votes
1
answer
239
views
FPGA Pin Polarity meaning
I have been assigning pins on a Lattice Seminconductor FPGA using Radiant Software. The FPGA is embedded on an evaluation board containing LEDs and buttons.
When opening the window to assign pins, ...
0
votes
1
answer
757
views
VHDL - FPGA implementation - Pulse trigger generated only once on mutiple button pushes
Hello everyone I wrote some VHDL code that implement a UART-TX from my FPGA to my desktop. To trigger data sending I use the signal(debounced ofc) coming from the on-board switch.
As long as the ...
2
votes
1
answer
760
views
Bitstream Encryption
I have a question related to bitstream encryption using eFUSE option. If my FPGA has bitstream encryption key stored in the eFUSE, how Vivado will know the encryption key when generating new encrypted ...
0
votes
1
answer
364
views
Is there any way to use FFMPEG expressions in bitstream filters options?
FFMPEG allows to set User Data Unregistered in SEI block with h264_metadata bitstream filter:
ffmpeg -i input/test.mp4 \
-bsf:v \
"h264_metadata=sei_user_data=c5bfd5ee-...
1
vote
0
answers
1k
views
Is it possible to make VFR MP4 from a raw h264 bitstream using ffmpeg?
I have a raw h264 bitstream that I'd like to put into MP4 using ffmpeg but ffmpeg always produces it with a constant frame rate and I need it to be the variable frame rate.
So lets say I have an MP4 ...
-1
votes
1
answer
280
views
Javascript / Nodered function node: bitstream operations
Following task to do:
There is a protocol that defines minimalistic data like:
binary 0 1 0 0 0 1 1 1 0 0 1 1 1 0
variable [-] [-----] [---] [-------]
name a b c d
where ...
1
vote
1
answer
800
views
How to Remove a frame from an HEVC bitstream?
I have an HEVC encoded bitstream (.bin and equivalent .mp4 file). I want to remove some frames from the bitstream to see how a decoder (or media player) behaves when a particular frame is lost.
enter ...
0
votes
1
answer
214
views
TypeError: 'BitStream' object cannot be interpreted as an integer
I am a newbie in the python world and I am getting an typing error that I am unsure of:
...File "/home/simon/python/piptroubleshoot/Main.py", line 15, in main
hexToBase64(u'...
2
votes
1
answer
530
views
Write bitstream to file in C
I'm currently trying to use a CMP decompressor: https://web.archive.org/web/20070113004119/http://rewiki.regengedanken.de:80/wiki/.CMP
It does in fact decompress the cmp, but it does not write it into ...
0
votes
1
answer
613
views
ZLIB inflate stream header format
after downloading ZLIB ver. 1.2.11 and looking through RFC1951
I'm trying to use ZLIB.inflate function like this:
#include "zlib.h"
int iRslt;
unsigned char buffIn[4]={0x4b,4,0,0};
unsigned ...
1
vote
1
answer
552
views
FFmpeg - How to encode raw screen buffers (frame arrays) into a bitstream?
I have thousands of frame arrays (NumPy) with shape (3, 225, 400), which were obtained from game screens.
Each one of those frame buffers has a label (screen class and timestamp). I'd like to create a ...
1
vote
1
answer
4k
views
Petalinux hangs during boot
I am trying to boot linux on a zedboard and monitor all memory accesses through Programmable Logic. I am first trying to boot linux with a start address 0x40000000. I am following this article https:...
0
votes
1
answer
171
views
Output values from VVC VTM reference software to a text file
Edited code from CABACWriter.cpp
This is the code I used to get the no.of bits in a macroblock and output them to a text file:
int before;
int after;
int diff;
ofstream outfile;
...
0
votes
2
answers
308
views
Extracting number of bits in a macroblock from VVC VTM reference software
Final:Result after calculating and displaying the differenceI am new to VVC and I am going through the reference software's code trying to understand it. I have encoded and decoded videos using the ...