Merge pull request #173 from amiaopensource/weaver-branch

add script for comparing audio framemd5

check_audio_framemd5.sh

@@ -0,0 +1,77 @@
+#!/usr/bin/env bash
+  SCRIPT=$(basename "${0}")
+ VERSION='2017-04-15'
+  AUTHOR='ffmprovisr'
+     RED='\033[1;31m'
+    BLUE='\033[1;34m'
+      NC='\033[0m'
+
+if [[ ${OSTYPE} = "cygwin" ]] || [ ! $(which diff) ]; then
+    echo -e "${RED}Error: 'diff' is not installed by default. Please install 'diffutils' from Cygwin.${NC}"
+    exit 1
+fi
+
+_output_prompt(){
+    cat <<EOF
+Usage: ${SCRIPT} [-h] | [ -i <av_file> -m <md5_file> ]
+EOF
+    exit 1
+}
+
+_output_help(){
+    cat <<EOF
+Syntax:
+  ${SCRIPT}
+    Prompts a short help message.
+  ${SCRIPT} -h
+    This help.
+  ${SCRIPT} -i <av_file> -m <md5_file>
+    Pass to the script the audio-visual file and the corresponding MD5
+    file to check.
+Dependency:
+  ffmpeg
+About:
+  Version: ${VERSION}
+  Website: https://github.com/amiaopensource/ffmprovisr/blob/gh-pages/check_audio_framemd5.sh
+EOF
+    exit 0
+}
+
+unset input_file
+unset input_hash
+
+while getopts ":hi:m:" opt; do
+    case "${opt}" in
+        h) _output_help ;;
+        i) input_file=$OPTARG ;;
+        m) input_hash=$OPTARG ;;
+        :) echo -e "${RED}Error: option -${OPTARG} requires an argument${NC}" ; _output_prompt ;;
+        *) echo -e "${RED}Error: bad option -${OPTARG}${NC}" ; _output_prompt ;;
+    esac
+done
+
+[[ -z "${#}" || ! ${input_file} || ! ${input_hash} ]] && _output_prompt
+echo -e "${BLUE}Please wait...${NC}"
+unset md5_tmp
+if [[ $OSTYPE = "cygwin" ]]; then
+    md5_tmp="${USERPROFILE}/$(basename "${input_hash}").tmp"
+else
+    md5_tmp="${HOME}/$(basename "${input_hash}").tmp"
+fi
+# Find audio frame size for hash calculation
+sample_rate=$(grep -v '^#' "${input_hash}" | head -n 1 | tr -d ' ' | cut -d',' -f4)
+ffmpeg -i "${input_file}" -loglevel 0 -af "asetnsamples=n='$sample_rate'" -f framemd5 -vn "${md5_tmp}"
+[[ ! -f ${md5_tmp} ]] && { echo -e "${RED}Error: '${input_file}' is not a valid audio-visual file.${NC}" ; _output_prompt ; }
+unset old_file
+unset tmp_file
+unset sample_rate
+old_file=$(grep -v '^#' "${input_hash}")
+tmp_file=$(grep -v '^#' "${md5_tmp}")
+if [[ "${old_file}" = "${tmp_file}" ]]; then
+    echo -e "${BLUE}'$(basename "${input_file}")' matches '$(basename "${input_hash}")'${NC}"
+    rm "${md5_tmp}"
+else
+    echo -e "${RED}The following differences were detected between '$(basename "${input_file}")' and '$(basename "${input_hash}")':${NC}"
+    diff "${input_hash}" "${md5_tmp}"
+    rm "${md5_tmp}"
+fi

check_video_framemd5.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
   SCRIPT=$(basename "${0}")
- VERSION='2016-12-31'
+ VERSION='2017-04-16'
   AUTHOR='ffmprovisr'
      RED='\033[1;31m'
     BLUE='\033[1;34m'
@@ -32,7 +32,7 @@ Dependency:
   ffmpeg
 About:
   Version: ${VERSION}
-  Website: https://github.com/amiaopensource/ffmprovisr/blob/gh-pages/check_framemd5.sh
+  Website: https://github.com/amiaopensource/ffmprovisr/blob/gh-pages/check_video_framemd5.sh
 EOF
     exit 0
 }
@@ -54,21 +54,21 @@ done
 echo -e "${BLUE}Please wait...${NC}"
 unset md5_tmp
 if [[ $OSTYPE = "cygwin" ]]; then
-    md5_tmp=""${USERPROFILE}/$(basename ${input_hash}).tmp""
+    md5_tmp="${USERPROFILE}/$(basename "${input_hash}").tmp"
 else
-    md5_tmp="${HOME}/$(basename ${input_hash}).tmp"
+    md5_tmp="${HOME}/$(basename "${input_hash}").tmp"
 fi
-$(ffmpeg -i ${input_file} -loglevel 0 -f framemd5 -an ${md5_tmp})
+ffmpeg -i "${input_file}" -loglevel 0 -f framemd5 -an "${md5_tmp}"
-[[ ! -f ${md5_tmp} ]] && { echo -e "${RED}Error: '${input_file}' is not a valid audio-visual file.${NC}" ; _output_prompt ; }
+[[ ! -f "${md5_tmp}" ]] && { echo -e "${RED}Error: '${input_file}' is not a valid audio-visual file.${NC}" ; _output_prompt ; }
 unset old_file
 unset tmp_file
-old_file=$(grep -v '^#' ${input_hash})
+old_file=$(grep -v '^#' "${input_hash}")
-tmp_file=$(grep -v '^#' ${md5_tmp})
+tmp_file=$(grep -v '^#' "${md5_tmp}")
 if [[ "${old_file}" = "${tmp_file}" ]]; then
-    echo -e "${BLUE}'$(basename ${input_file})' matches '$(basename ${input_hash})'${NC}"
+    echo -e "${BLUE}'$(basename "${input_file}")' matches '$(basename "${input_hash}")'${NC}"
     rm "${md5_tmp}"
 else
-    echo -e "${RED}The following differences were detected between '$(basename ${input_file})' and '$(basename ${input_hash})':${NC}"
+    echo -e "${RED}The following differences were detected between '$(basename "${input_file}")' and '$(basename "${input_hash}")':${NC}"
     diff "${input_hash}" "${md5_tmp}"
     rm "${md5_tmp}"
 fi

index.html

@@ -1172,7 +1172,7 @@ foreach ($file in $inputfiles) {
             <dt>-an</dt><dd>ignores the audio stream (audio no)</dd>
             <dt><i>output_file</i></dt><dd>path, name and extension of the output file</dd>
           </dl>
-          <p>You may verify an MD5 checksum file created this way by using a <a href="check_framemd5.sh" target="_blank">Bash script</a>.</p>
+          <p>You may verify an MD5 checksum file created this way by using a <a href="check_video_framemd5.sh" target="_blank">Bash script</a>.</p>
           <p class="link"></p>
         </div>
       </div>
@@ -1187,13 +1187,14 @@ foreach ($file in $inputfiles) {
       <div class="modal-content">
         <div class="well">
           <h3>Create MD5 checksums (audio samples)</h3>
-          <p><code>ffmpeg -i <i>input_file</i> -filter_complex "asetnsamples=<i>n=48000</i>" -f framemd5 -vn <i>output_file</i></code></p>
+          <p><code>ffmpeg -i <i>input_file</i> -af "asetnsamples=<i>n=48000</i>" -f framemd5 -vn <i>output_file</i></code></p>
           <p>This will create an MD5 checksum for each group of 48000 audio samples.<br> The number of samples per group can be set arbitrarily, but it's good practice to match the samplerate of the media file (so you will get one checksum per second).</p>
           <p>Examples for other samplerates:</p>
           <ul>
             <li>44.1 kHz: "asetnsamples=n=44100"</li>
             <li>96 kHz: "asetnsamples=n=96000"</li>
           </ul>
+          <p>Note: This filter trandscodes audio to 16 bit PCM by default. The generated framemd5s will represent this value. Validating these framemd5s will require using the same default settings.</p>
           <dl>
             <dt>ffmpeg</dt><dd>starts the command</dd>
             <dt>-i <i>input_file</i></dt><dd>path, name and extension of the input file</dd>
@@ -1201,7 +1202,7 @@ foreach ($file in $inputfiles) {
             <dt>-vn</dt><dd>ignores the video stream (video no)</dd>
             <dt><i>output_file</i></dt><dd>path, name and extension of the output file</dd>
           </dl>
-          <p>You may verify an MD5 checksum file created this way by using a <a href="check_framemd5.sh" target="_blank">Bash script</a>.</p>
+          <p>You may verify an MD5 checksum file created this way by using a <a href="check_audio_framemd5.sh" target="_blank">Bash script</a>.</p>
           <p class="link"></p>
         </div>
       </div>