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  • ffmpeg `avformat_write_header` fail with -22 Invalid arg

    3 février 2017, par user998953

    I am having an error with FFMPEG. Here is my code :

    static int open_output_file(const char *filename) {
    
    AVStream *out_stream;
    
    AVStream *in_stream;
    
    AVCodecContext *dec_ctx, *enc_ctx;
    
    AVCodec *encoder;
    
    int ret;
    
    unsigned int i;
    
    ofmt_ctx = NULL;
    
    avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, filename);
    
    if (!ofmt_ctx) {
    
        LOGD(NULL, AV_LOG_ERROR, "Could notcreate output context\n");
    
        return AVERROR_UNKNOWN;
    
    }
    
    for (i = 0; i < ifmt_ctx->nb_streams; i++) {
    
        out_stream = avformat_new_stream(ofmt_ctx, NULL);
    
        if (!out_stream) {
    
            LOGD(NULL, AV_LOG_ERROR, "Failed allocating output stream\n");
    
            return AVERROR_UNKNOWN;
    
        }
    
        in_stream = ifmt_ctx->streams[i];
    
        dec_ctx = in_stream->codec;
    
        enc_ctx = out_stream->codec;
    
        if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO
    
            || dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
    
            /* in this example, we choose transcoding to same codec */
    

    
            encoder = avcodec_find_encoder(dec_ctx->codec_id);
    
            enc_ctx = avcodec_alloc_context3(encoder);
    
            if (!encoder) {
    
                LOGE("encoder not avalibe ");
    
                return -1;
    
            }
    
            /* In this example, we transcode to same properties(picture size,
    
            * sample rate etc.). These properties can be changed for output
    
            * streams easily using filters */
    
            if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO) {
    
                enc_ctx->height = dec_ctx->height;
    
                enc_ctx->width = dec_ctx->width;
    
                enc_ctx->sample_aspect_ratio = dec_ctx->sample_aspect_ratio;
    
                /* take first format from list of supported formats */
    
                enc_ctx->pix_fmt = encoder->pix_fmts[0];
    
                /* video time_base can be set to whatever is handy andsupported by encoder */
    
                enc_ctx->time_base = dec_ctx->time_base;
    
            } else {
    
                enc_ctx->sample_rate = dec_ctx->sample_rate;
    
                enc_ctx->channel_layout = dec_ctx->channel_layout;
    
                enc_ctx->channels = av_get_channel_layout_nb_channels(enc_ctx->channel_layout);
    
                /* take first format from list of supported formats */
    
                enc_ctx->sample_fmt = encoder->sample_fmts[0];
    
                AVRational time_base = {1, enc_ctx->sample_rate};
    
                enc_ctx->time_base = time_base;
    
            }
    
            /* Third parameter can be used to pass settings to encoder*/
    
            ret = avcodec_open2(enc_ctx, encoder, NULL);
    
            if (ret < 0) {
    
                LOGD("Cannot openvideo encoder for stream #%u\n", i);
    
                return ret;
    
            }
    
        } else if (dec_ctx->codec_type == AVMEDIA_TYPE_UNKNOWN) {
    
            LOGE("Elementarystream #%d is of unknown type, cannot proceed\n",
    
                 i);
    
            return AVERROR_INVALIDDATA;
    
        } else {
    
            /* if this stream must be remuxed */
    
            ret = avcodec_copy_context(ofmt_ctx->streams[i]->codec,
    
                                       ifmt_ctx->streams[i]->codec);
    
            if (ret < 0) {
    
                LOGE("Copyingstream context failed\n");
    
                return ret;
    
            }
    
        }
    
        if (ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER)
    
            enc_ctx->flags |= CODEC_FLAG_GLOBAL_HEADER;
    
    }
    
    av_dump_format(ofmt_ctx, 0, filename, 1);
    
    if (!(ofmt_ctx->oformat->flags & AVFMT_NOFILE)) {
    
        ret = avio_open(&ofmt_ctx->pb, filename, AVIO_FLAG_WRITE);
    
        if (ret < 0) {
    
            LOGE("Could not open output file '%s'", filename);
    
            return ret;
    
        }
    
    }
    
    ret = avformat_write_header(ofmt_ctx, NULL); //wrong here
    
    if (ret < 0) {
    
        char buf[1024] = {0};
    
        av_strerror(ret, buf, 1024);
    
        LOGE("Error occurred when opening output file : %s\n", buf);
    
        return ret;
    
    }
    
    return 0;
    
}

    Here is the ffmpeg log. Pay close attention to the error I am getting which is :

    Error occurred when opening output file : Invalid argument

    Here is the rest of it :

    02-03 18:09:44.120 24571-24571/com.zhenbeiju.avplayer E/videoplayer: [mov,mp4,m4a,3gp,3g2,mj2 @ 0xebf33e00] After avformat_find_stream_info() pos: 680796 bytes read:308417 seeks:1 frames:48
    
02-03 18:09:44.120 24571-24571/com.zhenbeiju.avplayer E/videoplayer: [h264 @ 0xea72cc00] nal_unit_type: 7, nal_ref_idc: 3
    
02-03 18:09:44.120 24571-24571/com.zhenbeiju.avplayer E/videoplayer: [h264 @ 0xea72cc00] nal_unit_type: 8, nal_ref_idc: 3
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/sdcard/test2.mp4':
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer:   Metadata:
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     major_brand     : 
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer: mp42
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     minor_version   : 
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 0
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     compatible_brands: 
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer: isommp42
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     creation_time   : 
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 2017-01-23T08:22:57.000000Z
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     com.android.version: 
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 6.0.1
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer:   Duration: 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 00:00:07.74
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: , start: 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 0.000000
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: , bitrate: 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 14377 kb/s
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     Stream #0:0
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: (eng)
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: , 1, 1/90000
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: : Video: h264 (avc1 / 0x31637661), yuv420p, 1280x720, 13892 kb/s
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: , SAR 1:1 DAR 16:9
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: , 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 30.02 fps, 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 30 tbr, 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 90k tbn, 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 60.04 tbc
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer:  (default)
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     Metadata:
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer:       rotate          : 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 90
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer:       creation_time   : 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 2017-01-23T08:22:57.000000Z
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer:       handler_name    : 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: VideoHandle
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     Side data:
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer:       
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer: displaymatrix: rotation of -90.00 degrees
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     Stream #0:1
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer: (eng)
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer: , 47, 1/48000
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer: : Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 96 kb/s
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer:  (default)
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     Metadata:
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer:       creation_time   : 
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 2017-01-23T08:22:57.000000Z
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer:       handler_name    : 
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer: SoundHandle
    
02-03 18:09:44.124 24571-24571/com.zhenbeiju.avplayer E/videoplayer: [libx264 @ 0xdbf3dc00] using mv_range_thread = 56
    
02-03 18:09:44.126 24571-24571/com.zhenbeiju.avplayer E/videoplayer: [libx264 @ 0xdbf3dc00] using cpu capabilities: none!
    
02-03 18:09:44.197 24571-24571/com.zhenbeiju.avplayer E/videoplayer: [libx264 @ 0xdbf3dc00] profile High, level 4.0
    
02-03 18:09:44.199 24571-24571/com.zhenbeiju.avplayer E/videoplayer: Output #0, mp4, to '/sdcard/test3.mp4':
    
02-03 18:09:44.199 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     Stream #0:0
    
02-03 18:09:44.199 24571-24571/com.zhenbeiju.avplayer E/videoplayer: , 0, 0/0
    
02-03 18:09:44.199 24571-24571/com.zhenbeiju.avplayer E/videoplayer: : Unknown: none
    
02-03 18:09:44.200 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     Stream #0:1
    
02-03 18:09:44.200 24571-24571/com.zhenbeiju.avplayer E/videoplayer: , 0, 0/0
    
02-03 18:09:44.200 24571-24571/com.zhenbeiju.avplayer E/videoplayer: : Unknown: none
    
02-03 18:09:44.200 24571-24571/com.zhenbeiju.avplayer E/videoplayer: [file @ 0xdbdc71e0] Setting default whitelist 'file,crypto'
    
02-03 18:09:44.201 24571-24571/com.zhenbeiju.avplayer E/videoplayer: [mp4 @ 0xebf3a800] Could not find tag for codec none in stream #0, codec not currently supported in container
    
02-03 18:09:44.201 24571-24571/com.zhenbeiju.avplayer E/videoplayer: Error occurred when opening output file : Invalid argument

  • Anomalie #3875 : Impossible de voir les sous-rubriques

    9 février 2017, par denis -

    Juste pour préciser /158 donne en fait l’url complète /prog/2017/158/ qui pointe bien vers une rubrique.

    Et ça ne semble pas lié aux chiffres, si je crée une rubrique qui donne comme url coucou-coucou, j’ai bien accès à un article prog/2017/coucou-coucou/bonjour, si je la renomme en coucou l’url prog/2017/coucou/bonjour donne une erreur.

    C’est sans doute très marginal de se retrouver avec 2 urls /xxx et /xxx-xxx

  • bash script to install / update ffmpeg static builds

    1er mars 2017, par Joakim

    Hi I’m trying to make my first "real" bash script to do some real work than can be executed both manually and through cron jobs.

    The script should download and install the ffmpeg-static-build from https://johnvansickle.com/ffmpeg

    Here is what I’ve got so far :

    #!/bin/bash
    
# Still to come, see if the script runs with root privileges else exit
    
#Download FFMPEG static daily build and it's md5
    
cd ~
    
wget https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz | tar -xf
    
#wget https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz.md5
    
curl -L https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz.md5 | tar -xf | tee -a https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz | cut -d\  -f1 | md5sum > md5sum.txt
    

    

    
#Chech the md5 is currect
    
#md5sum -c MD5SUMS
    
file1="md5sum.txt"
    
file2="ffmpeg-git-64bit-static.tar.xz.md5"
    

    
if ! cmp --silent "$file1" "$file2"; then
    
    echo "md5sum doesn't match...\n exit" >&2
    
    exit 1
    
fi
    

    

    
#tar -xf ffmpeg-*.tar.xz
    
cp ffmpeg-*-static/ff* /usr/bin/
    
cp ffmpeg-*-static/ff* /usr/local/bin/
    
cp ffmpeg-*-static/qt-faststart /usr/bin/
    
cp ffmpeg-*-static/qt-faststart /usr/local/bin/
    
# Consider change second location to use ln -s
    
# Remove downloads and do some clean up
    

    
rm -fr ffmpeg-*
    

    
#EOF

    As you can see in the script i would like to add the md5sum check but it fails (got the md5sum check part from Compare md5 sums in bash script)

    If i remove the md5sum part the script is working, but right now the script fails at the | tar -xf | part with this code

    2017-02-28 00:10:24 (617 KB/s) - ‘ffmpeg-git-64bit-static.tar.xz’ saved [17564756/17564756]
    

    
tar: option requires an argument -- 'f'
    
Try 'tar --help' or 'tar --usage' for more information.
    
tee: 'https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz': No such file or directory
    
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
    
                                 Dload  Upload   Total   Spent    Left  Speed
    
100    65  100    65    0     0     87      0 --:--:-- --:--:-- --:--:--    87
    
(23) Failed writing body
    
md5sum doesn't match...
    
 exit

    As this is my first, I would appreciate any "I’m 4 years old" advices and why

    update

    Have made some changes to the script based on the suggestions in this thread, but my problem is I have no output what so ever at this state :( So I think it’s time to ask for the next clue

    #!/bin/bash
    

    
# version 0.3z
    

    
## Download FFMPEG static daily build and it's md5
    
## 
    
## To make this script working you might need to change the below values
    
## based on whether you are using a 32bit or 64 bit OS
    
## to obtain the right links you have to have a look @ https://johnvansickle.com/ffmpeg/
    
## and then change those below
    
## 
    
## If you are running on a shared server or dowsn't have root priviliges you might need to uncomment
    
## point 5.
    

    

    
# a "~" means running users home folder :) and should be different from destination dir
    
download_dir=~
    

    
# as this can change if the ffmpeg is to be stored on ex. shared server
    
dest_dir=/usr/bin/
    

    
# The version it equal the filename from above link
    
version=ffmpeg-git-64bit-static.tar.xz
    

    
## Do not change anything below here!!
    
source_url=https://johnvansickle.com/ffmpeg/builds/${version}
    
md5_url=https://johnvansickle.com/ffmpeg/builds/${version}.md5
    

    
# Still to come, see if the script runs with write privileges else exit
    

    
# 1. Can we enter download directory else exit
    
cd ${download_dir} ||
    

    
        printf "%s\n" "You can't enter this folder.\nPlease chage download_dir in this script..." >&2
    
        exit 1
    

    
# 2. Check the md5 is correct or have changed from last check
    
## instead of downloading ffmpeg-git-64bit-static.tar.xz every time,
    
## regardless if it is new or not, I recommend only downloading it
    
## if the md5 does not match. Would save John some bandwidth at least
    
## thx for the idea to @LordNeckbeard
    

    

    

    
## So somehow i'll guess some sed or grep only first part is nessesary :(
    
## This is getting more advance than expected for a first time script :/
    

    
if ! diff <(md5sum ${version}) <(curl -s ${md5_url})
    

    
    then
    
        printf "%s\n" "md5sum doesn't match...\n
    
                        Downloading new version" >&2
    
        rm -f ${version} >&2
    
        curl ${source_url} -o ${download_dir}/${version} >&2
    
        #exit 2
    

    
    elif
    
        diff <(md5sum ${version}) <(curl -s ${md5_url})
    
        printf "%s\n" "Nothing new to download" >&2
    
      exit 3
    
fi
    

    
# 3. untar
    
tar -xf ffmpeg-git-*-static.tar.xz
    

    
# 4. Move builds to destination directories
    

    
mv ${download_dir}/ffmpeg-*-static/ff* ${dest_dir}/
    
mv ${download_dir}/ffmpeg-*-static/qt-faststart ${dest_dir}/
    

    
# 5. Make soft links to static builds
    
ln -sfn ${dest_dir}/qt-faststart /usr/local/bin/qt-faststart
    
ln -sfn ${dest_dir}/ffmpeg /usr/local/bin/ffmpeg
    
ln -sfn ${dest_dir}/ffmpeg-10bit /usr/local/bin/ffmpeg-10bit
    
ln -sfn ${dest_dir}/ffprobe /usr/local/bin/ffprobe
    
ln -sfn ${dest_dir}/ffserver /usr/local/bin/ffserver
    

    
# Remove unzipped folder to do some clean up
    

    
rm -fr ffmpeg-git-*-static/
    

    
#EOF

    note : do to some more in depth answering of why not compile from source :
    1. This precompiled is usable on all Linux variations, despite distro and version
    2. It usable on shared hosting servers with ssh access

    UPDATE 2

        #!/bin/bash
    

    
# version 0.4z
    

    
## Download FFMPEG static daily build and it's md5
    
## 
    
## To make this script working you might need to change the below values
    
## based on whether you are using a 32bit or 64 bit OS
    
## to obtain the right links you have to have a look @ https://johnvansickle.com/ffmpeg/
    
## and then change those below
    
## 
    
## Finished and working script should be distributed under GPLv3: free as in freedom
    
## 
    
## If you are running on a shared server or dowsn't have root priviliges you might need to uncomment
    
## point 5.
    

    

    
# a "~" means running users home folder :) and should be different from destination dir
    
download_dir=~
    

    
# as this can change if the ffmpeg is to be stored on ex. shared server
    
dest_dir=/usr/bin/
    

    
# The version it equal the filename from above link
    
version=ffmpeg-git-64bit-static.tar.xz
    

    
## Do not change anything below here!!
    
source_url=https://johnvansickle.com/ffmpeg/builds/${version}
    
md5="curl -s https://johnvansickle.com/ffmpeg/builds/${version}.md5"
    

    
# Still to come, see if the script runs with write privileges else exit
    

    
# 1. Can we enter download directory else exit
    
cd ${download_dir} || 
    
        printf "%s\n" "You can't enter this folder.\nPlease chage download_dir in this script..." >&2
    
        exit 1
    

    
# 2. Check the md5 is correct or have changed from last check
    
## instead of downloading ffmpeg-git-64bit-static.tar.xz every time,
    
## regardless if it is new or not, I recommend only downloading it
    
## if the md5 does not match. Would save John some bandwidth at least
    
## thx for the idea to @LordNeckbeard
    

    
## This is getting more advance than expected for a first time script :/
    

    
if diff <(md5sum ${version}) <(${md5})
    

    
    then
    
        printf "%s\n" "No new version availeble" >&2
    
        exit 1
    

    
elif ! diff <(md5sum ${version}) <(${md5})
    
    then
    
        rm -f ${version}
    
        curl ${source_url} > ${version}
    
        exit 0
    

    
        #only proceed if downloaded version match it's md5
    
        if ! diff <(md5sum ${version}) <(${md5})
    
            then
    
            rm -f ${version}
    
            printf "%s\n" "Downloaded version is damaged, try later\ndamaged version have been deleted" >&2
    
            exit 1
    
        fi
    

    
            # 3. untar
    
            tar -xf ffmpeg-git-*-static.tar.xz
    

    
            # 4. Move builds to destination directories
    
            mv ${download_dir}/ffmpeg-*-static/ff* ${dest_dir}/
    
            mv ${download_dir}/ffmpeg-*-static/qt-faststart ${dest_dir}/
    

    
            # 5. Make soft links to static builds
    
            ln -sfn ${dest_dir}/qt-faststart /usr/local/bin/qt-faststart
    
            ln -sfn ${dest_dir}/ffmpeg /usr/local/bin/ffmpeg
    
            ln -sfn ${dest_dir}/ffmpeg-10bit /usr/local/bin/ffmpeg-10bit
    
            ln -sfn ${dest_dir}/ffprobe /usr/local/bin/ffprobe
    
            ln -sfn ${dest_dir}/ffserver /usr/local/bin/ffserver
    

    
            # Remove unzipped folder to do some clean up
    
            rm -fr ffmpeg-git-*-static/
    
            printf "%s\n" "Going to install new version" >&2
    
            exit 1
    
fi
    
#EOF

    But still having some issues :(

    1. Running this script returns : a blanc shell, but I’ve expected one of the printf statements
    2. When I’m trying to narrow down the problem and going back to basic and trying to run the script with only the "if" part it fails with 44 : Syntax error : "(" unexpected

    3. running the very same "if" part typed directly into the shell/terminal itself it’s all happy !!
      if diff <(md5sum ffmpeg-git-64bit-static.tar.xz) <(curl -s "https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz.md5"); then printf "%s\n" "No new version availeble" >&2; elif ! diff <(md5sum ffmpeg-git-64bit-static.tar.xz) <(curl -s "https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz.md5"); then rm -f ffmpeg-git-64bit-static.tar.xz; curl https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz > ffmpeg-git-64bit-static.tar.xz; printf "%s\n" "Going to install new version" >&2; fi

    4. I’m confused

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