public static function fixRed5WebcamFlv($flv_file_name, $new_file)
{
$flv_wrapper = new myFlvHandler($flv_file_name);
$header = $flv_wrapper->getHeader();
// sort timestamps because of a bug in red5 webcam recording
$sorted_tags = array();
$index = "";
$tag_count = 0;
$last_pos = $flv_wrapper->pos;
while ($tag = $flv_wrapper->getNextTag()) {
// list($type, $size, $timestamp, $keyframe, $start_pos) = $tag;
$index = sprintf("%010d%06d", $tag[self::TAG_FIELD_TIMESTAMP], ++$tag_count);
$sorted_tags[$index] = $last_pos;
$last_pos = $flv_wrapper->pos;
}
ksort($sorted_tags, SORT_NUMERIC);
$fh = fopen($new_file, "wb");
fwrite($fh, $header);
foreach ($sorted_tags as $timestamp => $pos) {
$flv_wrapper->seek($pos);
list($type, $size, $timestamp, $keyframe, $start_pos, $data) = $flv_wrapper->getNextTag(myFlvHandler::GET_NEXT_TAG_ALL);
if ($size != self::TAG_WRAPPER_SIZE) {
// dont write tag with no actual data
fwrite($fh, $data);
}
}
fclose($fh);
}
private static function iterateAssets($assets, $streamInfo, $addPadding, $echo)
{
if ($assets == null) {
return null;
}
$total_bytes = 0;
list($filePath, $timeline, $streamNum, $fileTimestamp) = $streamInfo;
$lastTimeStamp = 0;
$sizeList = array();
$timeList = array();
$filePositionsList = array();
$sizeListTime = 1000;
$dump_type = $echo ? myFlvHandler::GET_NEXT_TAG_ALL : myFlvHandler::GET_NEXT_TAG_META;
if ($addPadding) {
$silence_tag_data = '080000d1000000000000002efffb50c40003c00001a400000020000034800000' . '044c414d45332e39382e32555555555555555555555555555555555555555555' . '5555555555555555555555555555555555555555554c414d45332e39382e3255' . '5555555555555555555555555555555555555555555555555555555555555555' . '5555555555555555555555555555555555555555555555555555555555555555' . '5555555555555555555555555555555555555555555555555555555555555555' . '55555555555555555555555555555555555555555555555555555555000000dc';
$silence_tag = pack("H*", $silence_tag_data);
}
foreach ($assets as $asset) {
// in the future this will always be true,for backward compatibility - make sure will work OK if
// there is no edit flavor
$use_multi_flavor = $asset['file_name_edit'] && $asset['file_name_data'] && $timeline == "video";
$number_of_iterations = $use_multi_flavor ? 2 : 1;
for ($i = 0; $i < $number_of_iterations; $i++) {
if ($use_multi_flavor) {
if ($i == 0) {
$file_name = $asset['file_name_edit'];
// edit flavor with original attributes
$start_byte = $asset['start_byte'];
$end_byte = $asset['end_byte'];
} else {
$file_name = $asset['file_name_data'];
// original file name with '_play' attributes
$start_byte = $asset['start_byte_play'];
$end_byte = $asset['end_byte_play'];
}
KalturaLog::log("myFlvStreamer:: ({$i}) using {$file_name} ({$start_byte} - {$end_byte})");
} else {
$file_name = $asset['file_name_data'];
// original file name with original attributes
$start_byte = $asset['start_byte'];
$end_byte = $asset['end_byte'];
}
if ($start_byte >= $end_byte) {
// edit flavor not used (play clip was used from keyframe)
continue;
}
$first_frame = true;
KalturaLog::log("playing file [{$file_name}] from [{$start_byte}] to [{$end_byte}]");
// if should echo - don't optimize (we need the actual data
// if should not echo - use optimization
$flv_wrapper = new myFlvHandler($file_name);
$flv_wrapper->seek($start_byte);
$flv_tag_prev = $flv_wrapper->getNextTag($dump_type);
if ($flv_tag_prev == NULL) {
continue;
}
KalturaLog::log("file [{$file_name}]: flv_tag_prev is not null");
$videoTimeline = $timeline == "video";
while ($flv_tag_prev[myFlvHandler::TAG_FIELD_POS] < $end_byte) {
$flv_current_tag = $flv_wrapper->getNextTag($dump_type);
// dont write the last tag as we dont know its duration and we wont be able to give the next chunk
// a percise timestamp
if ($flv_current_tag == NULL) {
break;
}
$prev_tag_type = $flv_tag_prev[myFlvHandler::TAG_FIELD_TYPE];
if ($prev_tag_type != myFlvHandler::TAG_TYPE_METADATA) {
$prev_tag_timestamp = $flv_tag_prev[myFlvHandler::TAG_FIELD_TIMESTAMP];
if ($first_frame) {
$first_frame = false;
$lastTimeStamp -= $prev_tag_timestamp;
}
// if the timeline is video dump both audio and video data chunks
// otherwise (timeline is audio / voice) dump only audio data chunks
if ($videoTimeline || $prev_tag_type == myFlvHandler::TAG_TYPE_AUDIO) {
$currentTimeStamp = $prev_tag_timestamp + $lastTimeStamp;
if ($echo) {
echo myFlvHandler::dumpTag($flv_tag_prev[myFlvHandler::TAG_FIELD_DATA], $lastTimeStamp);
} else {
$total_bytes += $flv_tag_prev[myFlvHandler::TAG_FIELD_SIZE];
// we accumulate 3 types of metadata
// filepositions and times - VIDEOS - each keyframe. AUDIO - each second (used for scrubbing validation)
// bufferTimes - once per second (used for buffering calculations)
if ($videoTimeline) {
if ($flv_tag_prev[myFlvHandler::TAG_FIELD_KEYFRAME]) {
$filePositionsList[] = $total_bytes;
$timeList[] = $currentTimeStamp;
}
}
if ($sizeListTime < $currentTimeStamp) {
$sizeList[] = $total_bytes;
if (!$videoTimeline) {
$filePositionsList[] = $total_bytes;
$timeList[] = $sizeListTime;
}
$sizeListTime += 1000;
}
}
}
}
$flv_tag_prev = $flv_current_tag;
}
$lastTimeStamp += $flv_tag_prev[myFlvHandler::TAG_FIELD_TIMESTAMP];
}
// add silence padding between clips in order to give the flash player enough time to
// execute some logic in between.
if ($addPadding) {
$paddingTags = self::PADDING_TAGS;
while ($paddingTags--) {
if ($echo) {
echo myFlvHandler::dumpTag($silence_tag, $lastTimeStamp);
}
$lastTimeStamp += self::PADDING_TAG_TIME;
$total_bytes += self::PADDING_TAG_SIZE;
}
}
}
return array($sizeList, $timeList, $filePositionsList);
}
