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• ffmpeg "Error reinitializing filters !" on some webm videos

  9 février 2023, par The Blind Hawk

  I have a dozen of webm videos I need to resize with the following :

  


  ffmpeg -i input.webm -vf “scale=w=360:h=270:force_original_aspect_ratio=2,fps=10,crop=360:270” output.webm


  


  I tried the command and it worked fine for some webm videos, but most of the returned the following error :

  


  [AVFilterGraph @ 0x7fcb3db076c0] No such filter: '“scale'
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #0:0
[libopus @ 0x7fcb3c10a000] 1 frames left in the queue on closing
Conversion failed!


  


  I checked that ffmpeg still worked fine with previously successful files.
  
How can I get ffmpeg to work with the remaining wemb videos ?

  


• error building ffmpeg on mac high sierra 10.13 "workspace/bin/ffmpeg' : No such file or directory"

  14 mars 2023, par Martin

  Hello I am trying to create a shell script buildffmpeg.sh which when ran, will download and build ffmpeg, so you can automate the process of making a custom ffmpeg build where the end result is an ffmpeg and ffprobe executable.

  


  If you run the below script on mac or linux, it's worked perfectly, but when I test on my older macos 10.13 version, I first got an error about my ffmpeg snapshot url being too old :
FFMPEG_URL="https://git.ffmpeg.org/gitweb/ffmpeg.git/snapshot/74c4c539538e36d8df02de2484b045010d292f2c.tar.gz"
so I updated the var so it 'should' link to ffmpeg 6.0 (the most recent version, but im not sure if my link is correct)
FFMPEG_URL="https://git.ffmpeg.org/gitweb/ffmpeg.git/snapshot/adb4688bfb0652b2ffa5bc29e53761e27e1a3b3e.tar.gz"

  


  When I run my below script on my mac terminal with the command $ ./buildffmpeg.sh it prints out '11' and then fails with an error :

  


  ...
INSTALL libavutil/ffversion.h
INSTALL libavutil/libavutil.pc
~11~
/Library/Developer/CommandLineTools/usr/bin/objdump: '/Users/apple/Documents/projects/buildffmpeghighsierra/workspace/bin/ffmpeg': No such file or directory


  


  With the error being workspace/bin/ffmpeg': No such file or directory

  


  Is there something wrong with how my script builds ffmpeg ?

  


  #!/bin/bash

set -e

CWD=$(pwd)
PACKAGES="$CWD/packages"
WORKSPACE="$CWD/workspace"
ADDITIONAL_CONFIGURE_OPTIONS=""


mkdir -p "$PACKAGES"
mkdir -p "$WORKSPACE"
echo '~0~'
FFMPEG_TAG="$1"
FFMPEG_URL="https://git.ffmpeg.org/gitweb/ffmpeg.git/snapshot/adb4688bfb0652b2ffa5bc29e53761e27e1a3b3e.tar.gz"
echo '~1~'
FFMPEG_ARCHIVE="$PACKAGES/ffmpeg.tar.gz"
echo '~2~'
if [ ! -f "$FFMPEG_ARCHIVE" ]; then
    echo "Downloading tag ${FFMPEG_TAG}..."
    echo "~2.1~ FFMPEG_ARCHIVE=$FFMPEG_ARCHIVE"
    echo "~2.2~ FFMPEG_URL=$FFMPEG_URL"
    curl -L -k -o "$FFMPEG_ARCHIVE" "$FFMPEG_URL"
fi
echo '~3~'
EXTRACTED_DIR="$PACKAGES/extracted"
echo '~4~'
mkdir -p "$EXTRACTED_DIR"
echo '~5~'
echo "Extracting..."
tar -xf "$FFMPEG_ARCHIVE" --strip-components=1 -C "$EXTRACTED_DIR"
echo '~6~'
cd "$EXTRACTED_DIR"
echo '~7~'
echo "Building..."
echo '~8~'
# Min electron supported version
MACOS_MIN="10.10"
echo '~9~'
./configure $ADDITIONAL_CONFIGURE_OPTIONS \
    --pkgconfigdir="$WORKSPACE/lib/pkgconfig" \
    --pkg-config-flags="--static" \
    --extra-cflags="-I$WORKSPACE/include -mmacosx-version-min=${MACOS_MIN}" \
    --extra-ldflags="-L$WORKSPACE/lib -mmacosx-version-min=${MACOS_MIN}" \
    --extra-libs="-lpthread -lm" \
        --enable-static \
        --disable-securetransport \
        --disable-debug \
        --disable-shared \
        --disable-ffplay \
        --disable-lzma \
        --disable-doc \
        --enable-version3 \
        --enable-pthreads \
        --enable-runtime-cpudetect \
        --enable-avfilter \
        --enable-filters \
        --disable-libxcb \
        --enable-gpl \
        --disable-libass \
        --enable-libmp3lame \
        --enable-libx264 
echo '~10~'
make -j 4
echo '~11~'
make install
echo '~11~'
otool -L "$WORKSPACE/bin/ffmpeg"
echo '~12~'
otool -L "$WORKSPACE/bin/ffprobe"
echo '~13~'
echo "Building done. The binaries can be found here: $WORKSPACE/bin/ffmpeg $WORKSPACE/bin/ffprobe"
echo '~14~'
mkdir ffmpeg-mac/ 
echo '~15~'
cp -r "$WORKSPACE/bin/" "$CWD/ffmpeg-mac/"
echo '~16~'
rm -rf "$PACKAGES"
echo '~17~'
rm -rf "$WORKSPACE"
echo '~18~'
exit 0


  


• "Conversion failed !" when trying to write to frame to a rmtp stream

  8 mai 2023, par Loc Bui Nhien

  I'm trying to write video frames to an RTMP stream using FFMPEG and Python subsystem. The code will try to get videos in a 'ReceivedRecording' then it is stream to a RTMP streaming server using nginx. My method seems to work, but at times, the code will stop running due to

  


  [flv @ 0x55b933694b40] Failed to update header with correct duration.
[flv @ 0x55b933694b40] Failed to update header with correct filesize.


  


  and

  


  Conversion failed

  


  then

  


  BrokenPipeError: [Errno 32] Broken pipe

  


  Here my implementation of the task :

  


  import subprocess
import cv2
rtmp_url = "rtmp://..."

path = 'ReceivedRecording'

received_video_path = 'ReceivedRecording'
while True:
    video_files = [filenames for filenames in sorted(
        os.listdir(received_video_path))]
    # Loop through the videos and concatenate them
    for filename in video_files[:len(video_files)-1]:
        video = cv2.VideoCapture(os.path.join(received_video_path, filename))

        if p is None:
            fps = int(video.get(cv2.CAP_PROP_FPS))
            width = int(video.get(cv2.CAP_PROP_FRAME_WIDTH))
            height = int(video.get(cv2.CAP_PROP_FRAME_HEIGHT))
            # command and params for ffmpeg
            command = ['ffmpeg',
                        '-y',
                        '-f', 'rawvideo',
                        '-vcodec', 'rawvideo',
                        '-pix_fmt', 'bgr24',
                        '-s', "{}x{}".format(width, height),
                        '-re',
                        '-r', '5',
                        '-i', '-',
                        # '-filter:v', 'setpts=4.0*PTS',
                        '-c:v', 'libx264',
                        '-pix_fmt', 'yuv420p',
                        '-preset', 'ultrafast',
                        '-tune','zerolatency',
                        '-vsync','vfr',
                        # '-crf','23',
                        '-f', 'flv',
                        rtmp_url]
            
            # using subprocess and pipe to fetch frame data
            p = subprocess.Popen(command, stdin=subprocess.PIPE)
        else:

            # Loop through the frames of each video
            while True:
                start_time = time.time()

                ret, frame = video.read()
                if not ret:
                    # End of video, move to next video
                    video.release()
                    break

                p.stdin.write(frame.tobytes())

            os.remove(os.path.join(received_video_path, filename))


  


  Here is my nginx rtmp settings :

  


  rtmp {
    server {
        listen 1935;
        chunk_size 7096;

        application live {
            live on;
            record off;
            push rtmp://...;
        }
    }
}


  


  Here is the log file :

  


  av_interleaved_write_frame(): Connection reset by peer
No more output streams to write to, finishing.
[flv @ 0x5561d1ca9b40] Failed to update header with correct duration.
[flv @ 0x5561d1ca9b40] Failed to update header with correct filesize.
Error writing trailer of rtmp://...: Connection reset by peer
frame=    1 fps=0.0 q=20.0 Lsize=    1024kB time=00:00:00.00 bitrate=8390776.0kbits/s speed=0.00619x
video:1053kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Input file #0 (pipe:):
  Input stream #0:0 (video): 1 packets read (11059200 bytes); 1 frames decoded;
  Total: 1 packets (11059200 bytes) demuxed
Output file #0 (rtmp://...):
  Output stream #0:0 (video): 1 frames encoded; 1 packets muxed (1077799 bytes);
  Total: 1 packets (1077799 bytes) muxed
1 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0x5561d1cad380] Statistics: 0 seeks, 35 writeouts
[rtmp @ 0x5561d1cb7b80] Deleting stream...
[libx264 @ 0x5561d1caae40] frame I:1     Avg QP:20.00  size:1077192
[libx264 @ 0x5561d1caae40] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 0x5561d1caae40] coded y,uvDC,uvAC intra: 92.2% 50.5% 10.2%
[libx264 @ 0x5561d1caae40] i16 v,h,dc,p: 34% 16% 37% 12%
[libx264 @ 0x5561d1caae40] i8c dc,h,v,p: 35% 23% 33%  9%
[libx264 @ 0x5561d1caae40] kb/s:43087.68
[AVIOContext @ 0x5561d1ca6a80] Statistics: 11059200 bytes read, 0 seeks
Conversion failed!