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  • HLS script has been lost to time, previous content was made in specific format, attempting to recreate using FFMPEG primitives

    28 février, par Wungo

    Looking to add this video to a stitched playlist. The variants, encoding, and everything must match exactly. We have no access to how things were done previously, so I am literally vibing through this as best as I can.

    I recommend using a clip of buck bunny that's 30 seconds long, or the original buck bunny 1080p video.

    #!/bin/bash
ffmpeg -i bbb_30s.mp4 -filter_complex "
[0:v]split=7[v1][v2][v3][v4][v5][v6][v7];
[v1]scale=416:234[v1out];
[v2]scale=416:234[v2out];
[v3]scale=640:360[v3out];
[v4]scale=768:432[v4out];
[v5]scale=960:540[v5out];
[v6]scale=1280:720[v6out];
[v7]scale=1920:1080[v7out]
" \
-map "[v1out]" -c:v:0 libx264 -b:v:0 200k -maxrate 361k -bufsize 400k -r 29.97 -g 60 -keyint_min 60 -sc_threshold 0 -preset veryfast -profile:v baseline -level 3.0 \
-map "[v2out]" -c:v:1 libx264 -b:v:1 500k -maxrate 677k -bufsize 700k -r 29.97 -g 60 -keyint_min 60 -sc_threshold 0 -preset veryfast -profile:v baseline -level 3.0 \
-map "[v3out]" -c:v:2 libx264 -b:v:2 1000k -maxrate 1203k -bufsize 1300k -r 29.97 -g 60 -keyint_min 60 -sc_threshold 0 -preset veryfast -profile:v main -level 3.1 \
-map "[v4out]" -c:v:3 libx264 -b:v:3 1800k -maxrate 2057k -bufsize 2200k -r 29.97 -g 60 -keyint_min 60 -sc_threshold 0 -preset veryfast -profile:v main -level 3.1 \
-map "[v5out]" -c:v:4 libx264 -b:v:4 2500k -maxrate 2825k -bufsize 3000k -r 29.97 -g 60 -keyint_min 60 -sc_threshold 0 -preset veryfast -profile:v main -level 4.0 \
-map "[v6out]" -c:v:5 libx264 -b:v:5 5000k -maxrate 5525k -bufsize 6000k -r 29.97 -g 60 -keyint_min 60 -sc_threshold 0 -preset veryfast -profile:v high -level 4.1 \
-map "[v7out]" -c:v:6 libx264 -b:v:6 8000k -maxrate 9052k -bufsize 10000k -r 29.97 -g 60 -keyint_min 60 -sc_threshold 0 -preset veryfast -profile:v high -level 4.2 \
-map a:0 -c:a:0 aac -b:a:0 128k -ar 48000 -ac 2 \
-f hls -hls_time 6 -hls_playlist_type vod -hls_flags independent_segments \
-hls_segment_type fmp4 \
-hls_segment_filename "output_%v_%03d.mp4" \
-master_pl_name master.m3u8 \
-var_stream_map "v:0,name:layer-416x234-200k v:1,name:layer-416x234-500k v:2,name:layer-640x360-1000k v:3,name:layer-768x432-1800k v:4,name:layer-960x540-2500k v:5,name:layer-1280x720-5000k v:6,name:layer-1920x1080-8000k a:0,name:layer-audio-128k" \
output_%v.m3u8

    Above is what i've put together over the past few days.

    I consistently run into the same issues:

    1. my variants must match identically, the bit rate etc. must match identically no excuses. No variance allowed.
    2. When I did it a different way previously, it became impossible to sync the variants timing, thus making the project not stitchable, making the asset useless.The variants are encoded to last longer than the master.m3u8 says it will last. Rejecting the asset downstream.
    3. I end up either having variants mismatched with timing, or no audio/audio channels synced properly. Here is what the master.m3u8 should look like.
    #EXTM3U
#EXT-X-VERSION:7

#EXT-X-STREAM-INF:AUDIO="aac",AVERAGE-BANDWIDTH=333000,BANDWIDTH=361000,CLOSED-CAPTIONS="cc1",CODECS="avc1.4d400d,mp4a.40.2",FRAME-RATE=29.97,RESOLUTION=416x234
placeholder.m3u8
#EXT-X-STREAM-INF:AUDIO="aac",AVERAGE-BANDWIDTH=632000,BANDWIDTH=677000,CLOSED-CAPTIONS="cc1",CODECS="avc1.4d400d,mp4a.40.2",FRAME-RATE=29.97,RESOLUTION=416x234
placeholder2.m3u8
#EXT-X-STREAM-INF:AUDIO="aac",AVERAGE-BANDWIDTH=1133000,BANDWIDTH=1203000,CLOSED-CAPTIONS="cc1",CODECS="avc1.4d401e,mp4a.40.2",FRAME-RATE=29.97,RESOLUTION=640x360
placeholder3.m3u8

#EXT-X-STREAM-INF:AUDIO="aac",AVERAGE-BANDWIDTH=1933000,BANDWIDTH=2057000,CLOSED-CAPTIONS="cc1",CODECS="avc1.4d401f,mp4a.40.2",FRAME-RATE=29.97,RESOLUTION=768x432
placeholder4.m3u8

#EXT-X-STREAM-INF:AUDIO="aac",AVERAGE-BANDWIDTH=2633000,BANDWIDTH=2825000,CLOSED-CAPTIONS="cc1",CODECS="avc1.4d401f,mp4a.40.2",FRAME-RATE=29.97,RESOLUTION=960x540
placeholder5.m3u8

#EXT-X-STREAM-INF:AUDIO="aac",AVERAGE-BANDWIDTH=5134000,BANDWIDTH=5525000,CLOSED-CAPTIONS="cc1",CODECS="avc1.4d401f,mp4a.40.2",FRAME-RATE=29.97,RESOLUTION=1280x720
placeholder6.m3u8

#EXT-X-STREAM-INF:AUDIO="aac",AVERAGE-BANDWIDTH=8135000,BANDWIDTH=9052000,CLOSED-CAPTIONS="cc1",CODECS="avc1.640028,mp4a.40.2",FRAME-RATE=29.97,RESOLUTION=1920x1080
placeholder7.m3u8

#EXT-X-STREAM-INF:AUDIO="aac",AVERAGE-BANDWIDTH=129000,BANDWIDTH=130000,CLOSED-CAPTIONS="cc1",CODECS="mp4a.40.2"
placeholder8.m3u8

#EXT-X-MEDIA:AUTOSELECT=YES,CHANNELS="2",DEFAULT=YES,GROUP-ID="aac",LANGUAGE="en",NAME="English",TYPE=AUDIO,URI="placeholder8.m3u8"
#EXT-X-MEDIA:AUTOSELECT=YES,DEFAULT=YES,GROUP-ID="cc1",INSTREAM-ID="CC1",LANGUAGE="en",NAME="English",TYPE=CLOSED-CAPTIONS

    Underlying playlist clips should be *.mp4 not *.m4s or anything like that. Audio must be on a single channel by itself, closed captions are handled by a remote server and aren't a concern.

    as mentioned above:

    1. I have tried transcoding separately and then combining manually or later. Here is an example of that.
    #!/bin/bash
set -e

# Input file
INPUT_FILE="bbb_30.mp4"

# Output directory
OUTPUT_DIR="hls_output"
mkdir -p "$OUTPUT_DIR"

# First, extract exact duration from master.m3u8 (if it exists)
MASTER_M3U8="master.m3u8"  # Change if needed

echo "Extracting exact duration from the source MP4..."
EXACT_DURATION=$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "$INPUT_FILE")
echo "Using exact duration: $EXACT_DURATION seconds"
# Create a reference file with exact duration from the source
echo "Creating reference file with exact duration..."
ffmpeg -y -i "$INPUT_FILE" -c copy -t "$EXACT_DURATION" "$OUTPUT_DIR/exact_reference.mp4"

# Calculate exact GOP size for segment alignment (for 6-second segments at 29.97fps)
FPS=29.97
SEGMENT_DURATION=6
GOP_SIZE=$(echo "$FPS * $SEGMENT_DURATION" | bc | awk '{print int($1)}')
echo "Using GOP size of $GOP_SIZE frames for $SEGMENT_DURATION-second segments at $FPS fps"

# Function to encode a variant with exact duration
encode_variant() {
  local resolution="$1"
  local bitrate="$2"
  local maxrate="$3"
  local bufsize="$4"
  local profile="$5"
  local level="$6"
  local audiorate="$7"
  local name_suffix="$8"
  
  echo "Encoding $resolution variant with video bitrate $bitrate kbps and audio bitrate ${audiorate}k..."
  
  # Step 1: Create an intermediate file with exact duration and GOP alignment
  ffmpeg -y -i "$OUTPUT_DIR/exact_reference.mp4" \
    -c:v libx264 -profile:v "$profile" -level "$level" \
    -x264-params "bitrate=$bitrate:vbv-maxrate=$maxrate:vbv-bufsize=$bufsize:keyint=$GOP_SIZE:min-keyint=$GOP_SIZE:no-scenecut=1" \
    -s "$resolution" -r "$FPS" \
    -c:a aac -b:a "${audiorate}k" \
    -vsync cfr -start_at_zero -reset_timestamps 1 \
    -map 0:v:0 -map 0:a:0 \
    -t "$EXACT_DURATION" \
    -force_key_frames "expr:gte(t,n_forced*6)" \
    "$OUTPUT_DIR/temp_${name_suffix}.mp4"
  
  # Step 2: Create HLS segments with exact boundaries from the intermediate file.
  ffmpeg -y -i "$OUTPUT_DIR/temp_${name_suffix}.mp4" \
    -c copy \
    -f hls \
    -hls_time "$SEGMENT_DURATION" \
    -hls_playlist_type vod \
    -hls_segment_filename "$OUTPUT_DIR/layer-${name_suffix}-segment-%03d.mp4" \
    -hls_flags independent_segments+program_date_time+round_durations \
    -hls_list_size 0 \
    "$OUTPUT_DIR/layer-${name_suffix}.m3u8"
  
  # Verify duration
  VARIANT_DURATION=$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "$OUTPUT_DIR/temp_${name_suffix}.mp4")
  echo "Variant $name_suffix duration: $VARIANT_DURATION (target: $EXACT_DURATION, diff: $(echo "$VARIANT_DURATION - $EXACT_DURATION" | bc))"
  
  # Clean up temporary file
  rm "$OUTPUT_DIR/temp_${name_suffix}.mp4"
}

# Process each variant with exact duration matching
# Format: resolution, bitrate, maxrate, bufsize, profile, level, audio bitrate, name suffix
encode_variant "416x234" "333" "361" "722" "baseline" "3.0" "64" "416x234-200k"
encode_variant "416x234" "632" "677" "1354" "baseline" "3.0" "64" "416x234-500k"
encode_variant "640x360" "1133" "1203" "2406" "main" "3.0" "96" "640x360-1000k"
encode_variant "768x432" "1933" "2057" "4114" "main" "3.1" "96" "768x432-1800k"
encode_variant "960x540" "2633" "2825" "5650" "main" "3.1" "128" "960x540-2500k"
encode_variant "1280x720" "5134" "5525" "11050" "main" "3.1" "128" "1280x720-5000k"
encode_variant "1920x1080" "8135" "9052" "18104" "high" "4.0" "128" "1920x1080-8000k"

# 8. Audio-only variant
echo "Creating audio-only variant..."


# ffmpeg -y -i "$INPUT_FILE" \
#   -vn -map 0:a \
#   -c:a aac -b:a 128k -ac 2 \ 
#   -t "$EXACT_DURATION" \
#   -f hls \
#   -hls_time "$SEGMENT_DURATION" \
#   -hls_playlist_type vod \
#   -hls_flags independent_segments+program_date_time+round_durations \
#   -hls_segment_filename "$OUTPUT_DIR/layer-audio-128k-segment-%03d.ts" \
#   -hls_list_size 0 \
#   "$OUTPUT_DIR/layer-audio-128k.m3u8"

ffmpeg -y -i "$INPUT_FILE" \
  -vn \
  -map 0:a \
  -c:a aac -b:a 128k \
  -t "$EXACT_DURATION" \
  -f hls \
  -hls_time "$SEGMENT_DURATION" \
  -hls_playlist_type vod \
  -hls_segment_type fmp4 \
  -hls_flags independent_segments+program_date_time+round_durations \
  -hls_list_size 0 \
  -hls_segment_filename "$OUTPUT_DIR/layer-audio-128k-segment-%03d.m4s" \
  "$OUTPUT_DIR/layer-audio-128k.m3u8"


# Create master playlist
cat > "$OUTPUT_DIR/master.m3u8" << EOF
#EXTM3U
#EXT-X-VERSION:7
#EXT-X-INDEPENDENT-SEGMENTS

#EXT-X-STREAM-INF:BANDWIDTH=361000,AVERAGE-BANDWIDTH=333000,CODECS="avc1.4d400d,mp4a.40.2",RESOLUTION=416x234,FRAME-RATE=29.97
layer-416x234-200k.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=677000,AVERAGE-BANDWIDTH=632000,CODECS="avc1.4d400d,mp4a.40.2",RESOLUTION=416x234,FRAME-RATE=29.97
layer-416x234-500k.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1203000,AVERAGE-BANDWIDTH=1133000,CODECS="avc1.4d401e,mp4a.40.2",RESOLUTION=640x360,FRAME-RATE=29.97
layer-640x360-1000k.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=2057000,AVERAGE-BANDWIDTH=1933000,CODECS="avc1.4d401f,mp4a.40.2",RESOLUTION=768x432,FRAME-RATE=29.97
layer-768x432-1800k.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=2825000,AVERAGE-BANDWIDTH=2633000,CODECS="avc1.4d401f,mp4a.40.2",RESOLUTION=960x540,FRAME-RATE=29.97
layer-960x540-2500k.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=5525000,AVERAGE-BANDWIDTH=5134000,CODECS="avc1.4d401f,mp4a.40.2",RESOLUTION=1280x720,FRAME-RATE=29.97
layer-1280x720-5000k.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=9052000,AVERAGE-BANDWIDTH=8135000,CODECS="avc1.640028,mp4a.40.2",RESOLUTION=1920x1080,FRAME-RATE=29.97
layer-1920x1080-8000k.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=130000,AVERAGE-BANDWIDTH=129000,CODECS="mp4a.40.2"
layer-audio-128k.m3u8
EOF

# Verify all durations match
cat > "$OUTPUT_DIR/verify_all.sh" << 'EOF'
#!/bin/bash

# Get exact reference duration from the exact reference file
REFERENCE_DURATION=$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "exact_reference.mp4")
echo "Reference duration: $REFERENCE_DURATION seconds"

# Check each segment's duration
echo -e "\nChecking individual segments..."
for seg in layer-*-segment-*.mp4 layer-audio-128k-segment-*.ts; do
  dur=$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "$seg")
  echo "$seg: $dur seconds"
done

# Get total duration for each variant by summing segment EXTINF durations from each playlist
echo -e "\nChecking combined variant durations..."
for variant in layer-*.m3u8; do
  total=0
  while read -r line; do
    if [[ $line == "#EXTINF:"* ]]; then
      dur=$(echo "$line" | sed 's/#EXTINF:\([0-9.]*\).*/\1/')
      total=$(echo "$total + $dur" | bc)
    fi
  done < "$variant"
  echo "$variant: $total seconds (reference: $REFERENCE_DURATION, diff: $(echo "$total - $REFERENCE_DURATION" | bc))"
done
EOF

chmod +x "$OUTPUT_DIR/verify_all.sh"

echo "HLS packaging complete with exact duration matching."
echo "Master playlist available at: $OUTPUT_DIR/master.m3u8"
echo "Run $OUTPUT_DIR/verify_all.sh to verify durations."
rm "$OUTPUT_DIR/exact_reference.mp4"

    I end up with weird audio in vlc which can't be right, and I also end up with variants being longer than the master.m3u8 playlist which is wonky.

    I tried using AI to fix the audio sync issue, and honestly I'm more confused than when I started.

  • How to use multiple map values in ffmpeg-python ?

    27 février, par kamoloff

    How can I use multiple map values for different resolutions in ffmpeg-python?

        -map [v1out] -c:v:0 libx264 -b:v:0 1900k -bufsize 3800k \
    -map [v2out] -c:v:1 libx264 -b:v:0 900k -bufsize 1800k \

  • I can't understand how to use ffmpeg in javascript (if it's even possible)

    27 février, par Laimonas Rupeika

    Straight to the problem, I want to use ffmpeg in my javascript project for video editing. So I found cdn: <script src="https://cdn.jsdelivr.net/npm/@salomvary/ffmpeg.js-umd@3.1.9001/ffmpeg-mp4.min.js"></script> which references to "https://github.com/Kagami/ffmpeg.js", which is ffmpeg port to javascript as I understand? I don't get any errors on import, but if I try loading ffmpeg:

    // Initialize FFmpeg after the GAPI client is loaded
  const ffmpeg = createFFmpeg({ log: true });

  // // Load the FFmpeg library
  await ffmpeg.load();

    I get error: Uncaught (in promise) ReferenceError: createFFmpeg is not defined at initializeGapiClient (index:89:18) and it also messes my whole project. So if possible, how can I use ffmpeg in pure javascript, not Node.js. Should I download ffmpeg library files and then include them in project, I'm totally lost at this.

  • Use FFmpeg concat two video, is output video level mistake ?

    27 février, par 哇哈哈
    video1
{
    "index": 0,
    "codec_name": "hevc",
    "codec_long_name": "H.265 / HEVC (High Efficiency Video Coding)",
    "profile": "Main",
    "codec_type": "video",
    "codec_tag_string": "hev1",
    "codec_tag": "0x31766568",
    "width": 1920,
    "height": 1080,
    "coded_width": 1920,
    "coded_height": 1080,
    "has_b_frames": 2,
    "sample_aspect_ratio": "1:1",
    "display_aspect_ratio": "16:9",
    "pix_fmt": "yuv420p",
    "level": 120,
    "color_range": "tv",
    "chroma_location": "left",
    "field_order": "progressive",
    "refs": 1,
    "view_ids_available": "",
    "view_pos_available": "",
    "id": "0x1",
    "r_frame_rate": "30/1",
    "avg_frame_rate": "30/1",
    "time_base": "1/15360",
    "start_pts": 0,
    "start_time": "0.000000",
    "duration_ts": 200192,
    "duration": "13.033333",
    "bit_rate": "10794613",
    "nb_frames": "391",
    "extradata_size": 2496,
    "disposition": {
        "default": 1,
        "dub": 0,
        "original": 0,
        "comment": 0,
        "lyrics": 0,
        "karaoke": 0,
        "forced": 0,
        "hearing_impaired": 0,
        "visual_impaired": 0,
        "clean_effects": 0,
        "attached_pic": 0,
        "timed_thumbnails": 0,
        "non_diegetic": 0,
        "captions": 0,
        "descriptions": 0,
        "metadata": 0,
        "dependent": 0,
        "still_image": 0,
        "multilayer": 0
    },
    "tags": {
        "language": "eng",
        "handler_name": "VideoHandler",
        "vendor_id": "[0][0][0][0]",
        "encoder": "Lavc61.33.100 libx265",
        "timecode": "00:00:00;00"
    }
}

video2 
{
    "index": 0,
    "codec_name": "hevc",
    "codec_long_name": "H.265 / HEVC (High Efficiency Video Coding)",
    "profile": "Main",
    "codec_type": "video",
    "codec_tag_string": "hev1",
    "codec_tag": "0x31766568",
    "width": 1920,
    "height": 1080,
    "coded_width": 1920,
    "coded_height": 1080,
    "has_b_frames": 2,
    "sample_aspect_ratio": "1:1",
    "display_aspect_ratio": "16:9",
    "pix_fmt": "yuv420p",
    "level": 120,
    "color_range": "tv",
    "chroma_location": "left",
    "field_order": "progressive",
    "refs": 1,
    "view_ids_available": "",
    "view_pos_available": "",
    "id": "0x1",
    "r_frame_rate": "25/1",
    "avg_frame_rate": "25/1",
    "time_base": "1/12800",
    "start_pts": 0,
    "start_time": "0.000000",
    "duration_ts": 1309696,
    "duration": "102.320000",
    "bit_rate": "1024122",
    "nb_frames": "2558",
    "extradata_size": 2496,
    "disposition": {
        "default": 1,
        "dub": 0,
        "original": 0,
        "comment": 0,
        "lyrics": 0,
        "karaoke": 0,
        "forced": 0,
        "hearing_impaired": 0,
        "visual_impaired": 0,
        "clean_effects": 0,
        "attached_pic": 0,
        "timed_thumbnails": 0,
        "non_diegetic": 0,
        "captions": 0,
        "descriptions": 0,
        "metadata": 0,
        "dependent": 0,
        "still_image": 0,
        "multilayer": 0
    },
    "tags": {
        "language": "und",
        "handler_name": "VideoHandler",
        "vendor_id": "[0][0][0][0]",
        "encoder": "Lavc61.33.100 libx265"
    }
}

out:
{
    "index": 0,
    "codec_name": "hevc",
    "codec_long_name": "H.265 / HEVC (High Efficiency Video Coding)",
    "profile": "Main",
    "codec_type": "video",
    "codec_tag_string": "hev1",
    "codec_tag": "0x31766568",
    "width": 1920,
    "height": 1080,
    "coded_width": 1920,
    "coded_height": 1080,
    "has_b_frames": 2,
    "sample_aspect_ratio": "1:1",
    "display_aspect_ratio": "16:9",
    "pix_fmt": "yuv420p",
    "level": 186,
    "color_range": "tv",
    "chroma_location": "left",
    "field_order": "progressive",
    "refs": 1,
    "view_ids_available": "",
    "view_pos_available": "",
    "id": "0x1",
    "r_frame_rate": "30/1",
    "avg_frame_rate": "147450/5767",
    "time_base": "1/1000000",
    "start_pts": 0,
    "start_time": "0.000000",
    "duration_ts": 115340000,
    "duration": "115.340000",
    "bit_rate": "1060604",
    "nb_frames": "2949",
    "extradata_size": 2500,
    "disposition": {
        "default": 1,
        "dub": 0,
        "original": 0,
        "comment": 0,
        "lyrics": 0,
        "karaoke": 0,
        "forced": 0,
        "hearing_impaired": 0,
        "visual_impaired": 0,
        "clean_effects": 0,
        "attached_pic": 0,
        "timed_thumbnails": 0,
        "non_diegetic": 0,
        "captions": 0,
        "descriptions": 0,
        "metadata": 0,
        "dependent": 0,
        "still_image": 0,
        "multilayer": 0
    },
    "tags": {
        "language": "und",
        "handler_name": "VideoHandler",
        "vendor_id": "[0][0][0][0]",
        "encoder": "Lavc61.33.100 libx265"
    }
}

    output video level is 6.2 ? i wiki level refer to fps resolusion or bitrate,but not suit this output video. 0。0! Could Someone HELP me?

    ffmpeg -i .\HEVC_1080p_30P_yellowtree.mp4 -i .\HEVC_1080p_24fps_happy.mp4 -filter_complex "[0:v][1:v]concat=n=2:v=1:a=0[outv]" -map "[outv]" -c:v libx265 concat_output.mp4

    ffmpeg version N-118448-g43be8d0728-20250209 Copyright (c) 2000-2025 the FFmpeg developers built with gcc 14.2.0 (crosstool-NG 1.26.0.120_4d36f27) configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --enable-shared --disable-static --disable-w32threads --enable-pthreads --enable-iconv --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-libxml2 --enable-lzma --enable-fontconfig --enable-libharfbuzz --enable-libvorbis --enable-opencl --disable-libpulse --enable-libvmaf --disable-libxcb --disable-xlib --enable-amf --enable-libaom --enable-libaribb24 --enable-avisynth --enable-chromaprint --enable-libdav1d --enable-libdavs2 --enable-libdvdread --enable-libdvdnav --disable-libfdk-aac --enable-ffnvcodec --enable-cuda-llvm --enable-frei0r --enable-libgme --enable-libkvazaar --enable-libaribcaption --enable-libass --enable-libbluray --enable-libjxl --enable-libmp3lame --enable-libopus --enable-librist --enable-libssh --enable-libtheora --enable-libvpx --enable-libwebp --enable-libzmq --enable-lv2 --enable-libvpl --enable-openal --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --disable-libdrm --enable-vaapi --enable-libvidstab --enable-vulkan --enable-libshaderc --enable-libplacebo --disable-libvvenc --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --enable-libzvbi --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-libs=-lgomp --extra-ldflags=-pthread --extra-ldexeflags= --cc=x86_64-w64-mingw32-gcc --cxx=x86_64-w64-mingw32-g++ --ar=x86_64-w64-mingw32-gcc-ar --ranlib=x86_64-w64-mingw32-gcc-ranlib --nm=x86_64-w64-mingw32-gcc-nm --extra-version=20250209 libavutil 59. 56.100 / 59. 56.100 libavcodec 61. 33.100 / 61. 33.100 libavformat 61. 9.107 / 61. 9.107 libavdevice 61. 4.100 / 61. 4.100 libavfilter 10. 9.100 / 10. 9.100 libswscale 8. 13.100 / 8. 13.100 libswresample 5. 4.100 / 5. 4.100 libpostproc 58. 4.100 / 58. 4.100

  • Does ffmpeg violate the SAT>IP specification (DESCRIBE syntax) ? [closed]

    26 février, par Eric Woltermann

    I am trying to play a SAT>IP stream using ffmpeg -i rtsp://sat.ip/?src=1&freq=11493&pol=h&sr=22000&msys=dvbs&pids=0,5100,5101,5101,8191, which returns method DESCRIBE failed: 404 Not Found. For reference, VLC plays the stream just fine.

    When tcpflowing the ffmpeg traffic, I get the following:

    192.168.002.104.34018-192.168.002.222.00554: OPTIONS rtsp://sat.ip:554/?src=1&freq=11493&pol=h&sr=22000&msys=dvbs&pids=0,5100,5101,5101,8191 RTSP/1.0
CSeq: 1
User-Agent: Lavf58.29.100


192.168.002.222.00554-192.168.002.104.34018: RTSP/1.0 200 OK
CSeq: 1
Public: OPTIONS, SETUP, PLAY, TEARDOWN, DESCRIBE


192.168.002.104.34018-192.168.002.222.00554: DESCRIBE rtsp://sat.ip:554/?src=1&freq=11493&pol=h&sr=22000&msys=dvbs&pids=0,5100,5101,5101,8191 RTSP/1.0
Accept: application/sdp
CSeq: 2
User-Agent: Lavf58.29.100


192.168.002.222.00554-192.168.002.104.34018: RTSP/1.0 404 Not Found
CSeq: 2

    ffmpeg first issues an OPTION command, then a DESCRIBE, asking for the specified stream. The SAT>IP spec (http://www.satip.info/sites/satip/files/resource/satip_specification_version_1_2_2.pdf) however says in chap. 3.5.7:

    If no session has been previously setup on the SAT>IP server (and thus no stream has been created), the response to the DESCRIBE request will be error message 404 (stream not found). So in my opinion ffmpeg violates the spec when issuing a URI-specfic DESCRIBE without a SETUP, and thus the 404 response is correct.

    Am I missing something here?

    (By the way, of course I tried to open an issue in the ffmpeg bug tracker, but registration does not work).

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