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  • I need help merging two videos with ffpmeg

    25 juillet 2023, par Wolparzins

    I get an error when I try to merge two videos with FFMPEG.
It should take the resolution etc. from the first video.
I get the following error :

    


    


    Input link in0:v0 parameters (size 1080x1920, SAR 1:1) do not match the corresponding output link in0:v0 parameters (1080x1920, SAR 4:5)

    


    


    My console arguments are :

    


    -y -i "/home/test/Videos/Videos/First Video.mp4" -i "/home/test/Videos/Videos/Reference_Sub_884.mp4" -filter_complex "[0:v][1:v]scale2ref=iw:-2[v0][v1];[v0][0:a][v1][1:a]concat=n=2:v=1:a=1[out]" -map "[out]" -r 30 -b:v 2M "/home/test/Videos/Output/First Video.mp4_Reference_Sub_884.mp4"


    


    Can anyone help me with this ?

    


  • No valid H.264 encoder was found with the ffmpeg installation [closed]

    20 juin 2023, par EmJay

    I installed imageio-ffmpeg properly but encounterd the following error.

    


    Iteration 09990: train_psnr = 20.76 test_psnr = 0.00 mse = 0.008295:  40%|██████▍         | 9999/25000 [13:15&lt;19:53, 12.57it/s]&#xA;Traceback (most recent call last):&#xA;  File "/home/Code/OR_NeRF_custom/comparison/TensoRF/train.py", line 429, in <module>&#xA;    reconstruction(args)&#xA;  File "/home/Code/OR_NeRF_custom/comparison/TensoRF/train.py", line 343, in reconstruction&#xA;    PSNRs_test = evaluation(test_dataset, tensorf, args, renderer, f&#x27;{logfolder}/imgs_vis/&#x27;, N_vis=args.N_vis,&#xA;  File "/home/Home/Install/anaconda3/envs/ornerf/lib/python3.9/site-packages/torch/autograd/grad_mode.py", line 27, in decorate_context&#xA;    return func(*args, **kwargs)&#xA;  File "/home/Code/OR_NeRF_custom/comparison/TensoRF/renderer.py", line 78, in evaluation&#xA;    imageio.mimwrite(f&#x27;{savePath}/{prtx}video.mp4&#x27;, np.stack(rgb_maps), fps=30, quality=10)&#xA;  File "/home/Home/Install/anaconda3/envs/ornerf/lib/python3.9/site-packages/imageio/v2.py", line 495, in&#xA;mimwrite&#xA;    return file.write(ims, is_batch=True, **kwargs)&#xA;  File "/home/Home/Install/anaconda3/envs/ornerf/lib/python3.9/site-packages/imageio/core/legacy_plugin_wrapper.py", line 253, in write&#xA;    writer.append_data(image, metadata)&#xA;  File "/home/Home/Install/anaconda3/envs/ornerf/lib/python3.9/site-packages/imageio/core/format.py", line 590, in append_data&#xA;    return self._append_data(im, total_meta)&#xA;  File "/home/Home/Install/anaconda3/envs/ornerf/lib/python3.9/site-packages/imageio/plugins/ffmpeg.py", line 587, in _append_data&#xA;    self._initialize()&#xA;  File "/home/Home/Install/anaconda3/envs/ornerf/lib/python3.9/site-packages/imageio/plugins/ffmpeg.py", line 648, in _initialize&#xA;    self._write_gen.send(None)&#xA;  File "/home/Home/Install/anaconda3/envs/ornerf/lib/python3.9/site-packages/imageio_ffmpeg/_io.py", line&#xA;509, in write_frames&#xA;    codec = get_first_available_h264_encoder()&#xA;  File "/home/Home/Install/anaconda3/envs/ornerf/lib/python3.9/site-packages/imageio_ffmpeg/_io.py", line&#xA;130, in get_first_available_h264_encoder&#xA;    raise RuntimeError(&#xA;RuntimeError: No valid H.264 encoder was found with the ffmpeg installation&#xA;</module>

    &#xA;

    These are the installed libraries starts with 'im' listed by conda.

    &#xA;

    imagecodecs               2021.8.26        py39hfcb8610_2&#xA;imageio                   2.31.1             pyh24c5eb1_0    conda-forge&#xA;imageio-ffmpeg            0.4.8              pyhd8ed1ab_0    conda-forge&#xA;imagemagick               7.1.1_5         pl5321h211c493_1    conda-forge&#xA;imgaug                    0.4.0                    pypi_0    pypi&#xA;importlib-metadata        6.6.0                    pypi_0    pypi&#xA;importlib-resources       5.12.0                   pypi_0    pypi&#xA;

    &#xA;

    Since I'm not capable of using sudo, I hope the suggested answers to be independent to sudo instruction.

    &#xA;

  • errors when compiling c code with ffmpeg library

    2 mai 2017, par Kindermann

    I’ve installed ffmpeg library in my new ubuntu 16.04 OS. When I tried to compile my c code, I got the following strange errors :

    /home/widerstand/ffmpeg_build/lib/libavutil.a(hwcontext_vaapi.o): In function `vaapi_device_free':
    
/home/widerstand/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vaapi.c:861: undefined reference to `XCloseDisplay'
    
/home/widerstand/ffmpeg_build/lib/libavutil.a(hwcontext_vaapi.o): In function `vaapi_device_create':
    
/home/widerstand/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vaapi.c:891: undefined reference to `XOpenDisplay'
    
/home/widerstand/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vaapi.c:896: undefined reference to `vaGetDisplay'
    
/home/widerstand/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vaapi.c:903: undefined reference to `XDisplayName'
    
/home/widerstand/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vaapi.c:893: undefined reference to `XDisplayName'
    
/home/widerstand/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vaapi.c:917: undefined reference to `vaGetDisplayDRM'
    
/home/widerstand/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vaapi.c:891: undefined reference to `XOpenDisplay'
    
/home/widerstand/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vaapi.c:893: undefined reference to `XDisplayName'
    
/home/widerstand/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vaapi.c:898: undefined reference to `XDisplayName'
    
/home/widerstand/ffmpeg_build/lib/libavutil.a(hwcontext_vdpau.o): In function `vdpau_device_create':
    
/home/widerstand/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vdpau.c:431: undefined reference to `XOpenDisplay'
    
/home/widerstand/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vdpau.c:437: undefined reference to `XDisplayString'
    
/home/widerstand/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vdpau.c:439: undefined reference to `XDefaultScreen'
    
/home/widerstand/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vdpau.c:439: undefined reference to `vdp_device_create_x11'
    
/home/widerstand/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vdpau.c:433: undefined reference to `XDisplayName'
    
/home/widerstand/ffmpeg_build/lib/libavutil.a(hwcontext_vdpau.o): In function `vdpau_device_free':
    
/home/widerstand/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vdpau.c:410: undefined reference to `XCloseDisplay'
    
collect2: error: ld returned 1 exit status
    
Makefile:30: recipe for target 'video_analysis' failed
    
make: *** [video_analysis] Error 1

    I’ve reinstalled ffmpeg library multiple times using the following configurations :

    PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure \
    
  --prefix="$HOME/ffmpeg_build" \
    
  --pkg-config-flags="--static" \
    
  --extra-cflags="-I$HOME/ffmpeg_build/include" \
    
  --extra-ldflags="-L$HOME/ffmpeg_build/lib" \
    
  --bindir="$HOME/bin" \
    
  --enable-gpl \
    
  --enable-libass \
    
  --enable-libfdk-aac \
    
  --enable-libfreetype \
    
  --enable-libmp3lame \
    
  --enable-libopus \
    
  --enable-libtheora \
    
  --enable-libvorbis \
    
  --enable-libvpx \
    
  --enable-libx264 \
    
  --enable-nonfree
    
PATH="$HOME/bin:$PATH" make

    The installation process was successful each time. But when I tried to compile my own c code, I always encountered the same errors as mentioned above. I have no idea about that...
    Here is the makefile I used :

    EDIT :

    FFMPEG_LIBS=    libavdevice                        \
    
                libavformat                        \
    
                libavfilter                        \
    
                libavcodec                         \
    
                libswresample                      \
    
                libswscale                         \
    
                libavutil                          \
    

    
TARGET = video_analysis
    
LIBS = -lX11 -lm -lvdpau -lva
    
CC = gcc
    
CFLAGS += -O2 -g -O0
    
CFLAGS := $(shell pkg-config --cflags $(FFMPEG_LIBS)) $(CFLAGS)
    
LDLIBS := $(shell pkg-config --libs $(FFMPEG_LIBS)) $(LDLIBS)
    

    
.PHONY: default all clean
    

    
default: $(TARGET)
    
all: default
    

    
OBJECTS = $(patsubst %.c, %.o, $(wildcard *.c))
    
HEADERS = $(wildcard *.h)
    

    
%.o: %.c $(HEADERS)
    
    $(CC) $(CFLAGS) -c $&lt; -o $@
    

    
.PRECIOUS: $(TARGET) $(OBJECTS)
    

    
$(TARGET): $(OBJECTS)
    
    $(CC) $(OBJECTS) $(LDLIBS) $(LIBS) -o $@
    

    
clean:
    
    -rm -f *.o
    
    -rm -f $(TARGET)

    EDIT :

    Afer swapping $(LIBS) and $(LDLIBS) to be $(LDLIBS) $(LIBS) at line 30, it looks much better, but the compiler still reports the following errors :

    /root/ffmpeg_build/lib/libavutil.a(hwcontext_vaapi.o): In function `vaapi_device_create':
    
/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vaapi.c:896: undefined reference to `vaGetDisplay'
    
/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vaapi.c:917: undefined reference to `vaGetDisplayDRM'

    I have no idea which library is still missing ? It looks as if libva were still missing ?...
    I got the answer by myself...Have a look at here : errors of ’vaGetDisplay’ and `vaGetDisplayDRM’

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