Flash Tutorials - Herong's Tutorial Examples - v3.03, by Dr. Herong Yang
Issue with "ffplay" on SWF Output File
This section provides a tutorial example showing an issue with 'ffprobe' and 'ffplay' commands from FFmpeg on the SWF file generated by the 'ffmpeg' conversion command.
After converting the example movie file from MPEG 4 format to SWF format, let's verify the resulting output file, Tony_reelshow_2009_512kb.swf.
Check the output with "swfdump" command from SWFTools first:
C:\herong>\local\SWFTools\swfdump Tony_reelshow_2009_512kb.swf
[HEADER] File version: 6
[HEADER] File size: 8383705
[HEADER] Frame rate: 25.000000
[HEADER] Frame count: 4795
[HEADER] Movie width: 416.00
[HEADER] Movie height: 240.00
[02d] 6 SOUNDSTREAMHEAD2
[03c] 10 DEFINEVIDEOSTREAM defines id 0000 (4795 frames,
416x240 sorenson h.263)
[01a] 21 PLACEOBJECT2 places id 0000 at depth 0001 name "video"
[03d] 6485 VIDEOFRAME adds information to id 0000 (frame 0) 416x240
I-frame deblock 1 quant: 3
[013] 421 SOUNDSTREAMBLOCK
[001] 0 SHOWFRAME 1 (00:00:00,000)
[01a] 5 PLACEOBJECT2 moves object at depth 0001
[03d] 1069 VIDEOFRAME adds information to id 0000 (frame 1) 416x240
P-frame deblock 1 quant: 2
[013] 422 SOUNDSTREAMBLOCK
[001] 0 SHOWFRAME 2 (00:00:00,040)
...
It looks good. 4795 frames and 25 frames per second gives 00:03:11.400 play time matching the original MPEG4 file. Resolution 416x240 pixels is also maintained.
Check the output with "ffprove" command from FFmpeg:
C:\herong>\local\ffmpeg\bin\ffprobe Tony_reelshow_2009_512kb.swf ... [swf@03ee28c0] Estimating duration from bitrate, this may be inaccurate Input #0, swf, from 'Tony_reelshow_2009_512kb.swf': Duration: 00:08:44.00, start: 0.000000, bitrate: 127 kb/s Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Stream #0:1: Video: flv1, yuv420p, 416x240, 25 fps, 25 tbr, 25 tbn
The output looks ok except "Duration: 00:08:44.00". "ffprobe" command failed to calculate the correct play time. It should be "00:03:11.400". This seems to be a code bug in "ffprobe".
Play the output with "ffplay" command from FFmpeg:
C:\herong>\local\ffmpeg\bin\ffplay Tony_reelshow_2009_512kb.swf ... 208.83 A-V: -0.016 fd= 16 aq= 0KB vq= 0KB sq= 0B f=0/0 ... 696.10 A-V: -0.010 fd= 12 aq= 0KB vq= 0KB sq= 0B f=0/0 ...
The "ffplay" command also has an issue after it reaches the last SWF frame at 191.40 seconds (or 00:03:11.400 in timestamp). "ffplay" failed to stop the play and continued to play forever with some junk data.
Play the output with "flashplayer_13_sa" command from Flash Player Projector:
C:\herong>\local\bin\flashplayer_13_sa Tony_reelshow_2009_512kb.swf
"flashplayer_13_sa" had no problem to play the SWF file.
Table of Contents
Adobe Flash Player Plugin for Firefox
Adobe Flash Player Plugin for Chrome
Adobe Flash Player Plugin for Safari
Adobe Flash Player ActiveX for IE
Using "object" Elements for Flash Files
Using "embed" Elements for Flash Files
"mp3player" - MP3 Music Player
SWFObject - Hidding "object" behind JavaScript
SWFTools - SWF File Manipulation Tools
SWFC Script to Generate Flash SWF Files
ActionScript Embedded in SWFC Script
AS3Compile - ActionScript 3 Compiler
►SWF Files for Video and Audio Streams
Video and Audio Stream SWF File Structure
Installing FFmpeg to Manipulate Video SWF Files
Playing Movie with FFmpeg "ffplay" Command
See File Properties with FFmpeg "ffprobe" Command
Convert File Format with "ffmpeg" Command
►Issue with "ffplay" on SWF Output File
Break Long Video into Parts with "ffmpeg"
Concatenate Video Files with "ffmpeg"
Video/Audio Stream Concatenation Order
Split Audio Stream Out of SWF File
Split Video Stream Out of SWF File
Merge Video and Audio Streams to SWF File