MP4 to FLV

Task:

• MP4 video to FLV video
• No block noise
• Good sound quality
• Keep aspect ratio

Input:

• H264 MPEG-4 AVC (part 10) (avc1)
• Resolution: 1280x720
• Frame rate: 29.970030
• Decoded format: Planar 4:2:0 YUV
• MPEG AAC Audio (mp4a)
• Channels: Stereo
• Sample rate 48000 Hz

The app I used:

WonTube Free Video Converter
https://itunes.apple.com/jp/app/wontube-free-video-converter/id495101962?l=en&mt=12


The app's screenshot:

WonTube Free Video Converter

Results:

• FLV file (6000kbps; 340MB)
• FLV file (3000kbps; 176MB)

Flash video

• Flash video is Digital container format
• Flash Video may be embedded in SWF
• SWF is acronym for Small Web Format
• FLV and F4V are Flash Video
• F4V is based on ISO base media file format
• F4V started from Flash Player 9 update 3
• FLV and F4V are supported in Adobe Flash Player
• FLV was originally developed by Macromedia
• Flash Video uses RTMP
• RTMP is acronym for Real Time Messaging Protocol
• RTMP is a Proprietary protocol
• FLV may contain videos with different codecs
• Codecs includes Sorenson Spark, VP6, H.264, HE-AAC
• SWF supports video from Flash Player 6
• Flash Player 7 added support for FLV
• Flash Player does not check Filename extension
• F4V is completely different from FLV
• F4V does not support Screen video
• F4V does not support Sorenson Spark
• F4V does not support VP6 video compression format
• F4V does not support ADPCM
• F4V does not support Nellymoser audio compression format
• F4V is strongly recommended by Authors of Flash Player
• FLV has limitation when streaming H.264 or AAC
• File suffix for Flash Video is .flv ?
• Internet media type for FLV is video/x-flv ?
• File suffix for F4V is .f4v ?
• Internet media type for F4V is video/mp4 ?
• SWF for Flash Player 6 or later can communicate with Adobe Flash Media Server
• Adobe Flash Media uses RTMP
• Flash Player can play FLV embedded in SWF created for Flash Player 7
• Flash Player can play F4V embedded in SWF created for Flash Player 9
• FLV contain Bitstream of variant of H.263
• FLV uses Sorenson Spark
• Sorenson Spark is a variant of H.263
• Sorenson Spark is older Codec
• Sorenson Spark is widely available and compatible
• Sorenson Spark is the first Codec supported in Flash Player
• Sorenson Spark is required Video coding format in Flash Player 6 and 7
• On2 TrueMotion VP6 is supported in Flash Player 8 and newer
• On2 TrueMotion VP6 is preferred in Flash Player 8 and newer
• On2 TrueMotion VP6 has better quality than Sorenson Spark
• On2 TrueMotion VP6 is computationally more complex than Sorenson Spark
• Screen video is also called Screenshare
• FLV supports two versions of Screenshare
• Screenshare is an Codec for Screencast