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ffmpeg - Writing thumbnail to Azure Blob Storage
20 juin 2018, par HeinrichIs is possible to write directly to Azure using ffmpeg ? I am using ffmpeg to generate thumbnails for videos and I need to save them to an Azure Blob storage using a pre generated SAS url, is this possible ?
When I run ffmpeg it seems to run happily, without any trace of errors as far as I can tell, but the file is never written\create in the storage. I know the target url works as I can upload a file to exact same url using postman.Below is the ffmpeg command that I am trying to get to work :
.\ffmpeg.exe -i {srcurl} -loglevel 48 -frames:v 1 -y -method PUT -chunked_post 0 -headers "x-ms-blob-type: BlockBlob" -f apng {targeturl}I took the urls out as they are to long but the are both in the format as below :
https://{host}.blob.core.windows.net/{pathtofile}/{filename}?sp=r&st=2018-06-03T23:07:25Z&se=2018-06-04T07:07:25Z&spr=https&sv=2017-11-09&sig={signature}Now I know that it works to some degree because if I write the file locally everything is happy. ffmpeg is able to get the video from the source url, read the file and create a thumbnail locally.
The thing that confuses me more however is that if I specify a rubbish url path, one where I know it shouldn’t have permission to write to, it still does not complain at all.
It is able to resolve the host name because changing the host to some non-existent one it will cause the "Failed to resolve hostname" error.
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Open CV Codec FFMPEG Error fallback to use tag 0x7634706d/'mp4v'
22 mai 2019, par CohenDoing a filter recording and all is fine. The code is running, but at the end the video is not saved as MP4. I have this error :
OpenCV: FFMPEG: tag 0x44495658/'XVID' is not supported with codec id 12 and format 'mp4 / MP4 (MPEG-4 Part 14)'
OpenCV: FFMPEG: fallback to use tag 0x7634706d/'mp4v'Using a MAC and the code is running correctly, but is not saving. I tried to find more details about this error, but wasn’t so fortunate. I use as editor Sublime. The code run on Atom tough but is giving this error :
OpenCV: FFMPEG: tag 0x44495658/'XVID' is not supported with codec id 12 and format 'mp4 / MP4 (MPEG-4 Part 14)'
OpenCV: FFMPEG: fallback to use tag 0x7634706d/'mp4v'
2018-05-28 15:04:25.274 Python[17483:2224774] AVF: AVAssetWriter status: Cannot create file....
import numpy as np
import cv2
import random
from utils import CFEVideoConf, image_resize
import glob
import math
cap = cv2.VideoCapture(0)
frames_per_seconds = 24
save_path='saved-media/filter.mp4'
config = CFEVideoConf(cap, filepath=save_path, res='360p')
out = cv2.VideoWriter(save_path, config.video_type, frames_per_seconds, config.dims)
def verify_alpha_channel(frame):
try:
frame.shape[3] # looking for the alpha channel
except IndexError:
frame = cv2.cvtColor(frame, cv2.COLOR_BGR2BGRA)
return frame
def apply_hue_saturation(frame, alpha, beta):
hsv_image = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)
h, s, v = cv2.split(hsv_image)
s.fill(199)
v.fill(255)
hsv_image = cv2.merge([h, s, v])
out = cv2.cvtColor(hsv_image, cv2.COLOR_HSV2BGR)
frame = verify_alpha_channel(frame)
out = verify_alpha_channel(out)
cv2.addWeighted(out, 0.25, frame, 1.0, .23, frame)
return frame
def apply_color_overlay(frame, intensity=0.5, blue=0, green=0, red=0):
frame = verify_alpha_channel(frame)
frame_h, frame_w, frame_c = frame.shape
sepia_bgra = (blue, green, red, 1)
overlay = np.full((frame_h, frame_w, 4), sepia_bgra, dtype='uint8')
cv2.addWeighted(overlay, intensity, frame, 1.0, 0, frame)
return frame
def apply_sepia(frame, intensity=0.5):
frame = verify_alpha_channel(frame)
frame_h, frame_w, frame_c = frame.shape
sepia_bgra = (20, 66, 112, 1)
overlay = np.full((frame_h, frame_w, 4), sepia_bgra, dtype='uint8')
cv2.addWeighted(overlay, intensity, frame, 1.0, 0, frame)
return frame
def alpha_blend(frame_1, frame_2, mask):
alpha = mask/255.0
blended = cv2.convertScaleAbs(frame_1*(1-alpha) + frame_2*alpha)
return blended
def apply_circle_focus_blur(frame, intensity=0.2):
frame = verify_alpha_channel(frame)
frame_h, frame_w, frame_c = frame.shape
y = int(frame_h/2)
x = int(frame_w/2)
mask = np.zeros((frame_h, frame_w, 4), dtype='uint8')
cv2.circle(mask, (x, y), int(y/2), (255,255,255), -1, cv2.LINE_AA)
mask = cv2.GaussianBlur(mask, (21,21),11 )
blured = cv2.GaussianBlur(frame, (21,21), 11)
blended = alpha_blend(frame, blured, 255-mask)
frame = cv2.cvtColor(blended, cv2.COLOR_BGRA2BGR)
return frame
def portrait_mode(frame):
cv2.imshow('frame', frame)
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
_, mask = cv2.threshold(gray, 120,255,cv2.THRESH_BINARY)
mask = cv2.cvtColor(mask, cv2.COLOR_GRAY2BGRA)
blured = cv2.GaussianBlur(frame, (21,21), 11)
blended = alpha_blend(frame, blured, mask)
frame = cv2.cvtColor(blended, cv2.COLOR_BGRA2BGR)
return frame
def apply_invert(frame):
return cv2.bitwise_not(frame)
while(True):
# Capture frame-by-frame
ret, frame = cap.read()
frame = cv2.cvtColor(frame, cv2.COLOR_BGR2BGRA)
#cv2.imshow('frame',frame)
hue_sat = apply_hue_saturation(frame.copy(), alpha=3, beta=3)
cv2.imshow('hue_sat', hue_sat)
sepia = apply_sepia(frame.copy(), intensity=.8)
cv2.imshow('sepia',sepia)
color_overlay = apply_color_overlay(frame.copy(), intensity=.8, red=123, green=231)
cv2.imshow('color_overlay',color_overlay)
invert = apply_invert(frame.copy())
cv2.imshow('invert', invert)
blur_mask = apply_circle_focus_blur(frame.copy())
cv2.imshow('blur_mask', blur_mask)
portrait = portrait_mode(frame.copy())
cv2.imshow('portrait',portrait)
if cv2.waitKey(20) & 0xFF == ord('q'):
break
# When everything done, release the capture
cap.release()
cv2.destroyAllWindows() -
Command for putting watermark on video
28 juin 2018, par YupiI tried to put watermark on one video but FFmpeg command won’t execute and error code is 3037. I run the same code for trimming video and video is trimmed successfully so there is no issues with
inputpathoroutputpathalso I haveic_watermark.pngin assets folder. I tried with image fromDrawablebut same error code.So here is the command which I tried to run and put watermark in right corner :
String[] cmd = new String[]{"-i", videoInputPath, "-i", imagePath, "-filter_complex", "overlay=main_w-overlay_w-5:main_h-overlay_h-5", videoOutPath };and this is the whole method :
private void executeFFmepg(String inputPath, String outputPath, String customCommand){
final Command command = videoKit.createCommand()
.overwriteOutput()
.inputPath(inputPath)
.outputPath(outputPath)
.customCommand(customCommand)
.experimentalFlag()
.build();
new AsyncCommandExecutor(command, this).execute();
}I used one library based on
FFmpeg: https://github.com/inFullMobile/videokit-ffmpeg-android
and description says that this is basically invoking FFmpeg main() with CLI arguments.This is what I get from
Log:ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.8 (GCC)
configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
libavutil 55. 17.103 / 55. 17.103
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
05-29 15:35:08.591 24037-24037/com.cleatchaser D/FFmpeg: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/DCIM/Camera/20180406_140202.mp4':
Metadata:
major_brand : isom
minor_version : 0
05-29 15:35:08.596 24037-24037/com.cleatchaser D/FFmpeg: compatible_brands: isom3gp4
creation_time : 2018-04-06 12:02:25
Duration: 00:00:15.06, start: 0.000000, bitrate: 17185 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 17029 kb/s, 29.95 fps, 30 tbr, 90k tbn, 180k tbc (default)
05-29 15:35:08.601 24037-24037/com.cleatchaser D/FFmpeg: Metadata:
rotate : 90
creation_time : 2018-04-06 12:02:25
handler_name : VideoHandle
Side data:
05-29 15:35:08.606 24037-24037/com.cleatchaser D/FFmpeg: displaymatrix: rotation of -90.00 degrees
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 123 kb/s (default)
Metadata:
creation_time : 2018-04-06 12:02:25
05-29 15:35:08.611 24037-24037/com.cleatchaser D/FFmpeg: handler_name : SoundHandle
05-29 15:35:08.756 24037-24037/com.cleatchaser D/FFmpeg: Input #1, png_pipe, from '/storage/emulated/0/watermark.png':
Duration: N/A, bitrate: N/A
Stream #1:0: Video: png, rgba(pc), 856x1324, 25 tbr, 25 tbn, 25 tbcI tried many answers from similar questions but none of them worked.
Is possible that error is in quotes ?
I don’t have experience with FFmpeg so any help would be very appreciated. Thanks
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