[Michael Rampe]

Thanks Rodney.

I will investigate.

Michael

“half-way to world domination A.K.A. the belligerent blue bike shed”

[Michael Rampe]

I am stumped.

Try to force the q factor with -qmin 1 -qmax 1 and see if this has an effect.

For the presets: look into your installed FFmpeg folder and open the subfolder called ffpresets. The file for the -vpre hq setting is called “libx264-hq.ffpreset”. Does that exist on your install?

Michael

“half-way to world domination A.K.A. the belligerent blue bike shed”

[Michael Rampe]

The “moov” atom in the mp4 container is mostly related to progressive download rather than streaming. I currently stream mp4 files without the “moov” atom using a Wowsa server and JW player. No problem streaming without the atom.

I looked into the FFserver config file I have installed on the box I am on at the moment (0.5.1) and it states:

# Format of the stream : you can choose among:
# mpeg : MPEG-1 multiplexed video and audio
# mpegvideo : only MPEG-1 video
# mp2 : MPEG-2 audio (use AudioCodec to select layer 2 and 3 codec)
# ogg : Ogg format (Vorbis audio codec)
# rm : RealNetworks-compatible stream. Multiplexed audio and video.
# ra : RealNetworks-compatible stream. Audio only.
# mpjpeg : Multipart JPEG (works with Netscape without any plugin)
# jpeg : Generate a single JPEG image.
# asf : ASF compatible streaming (Windows Media Player format).
# swf : Macromedia Flash compatible stream
# avi : AVI format (MPEG-4 video, MPEG audio sound)

I think the problem is the server, not the file. mp4 (container) is not listed as a supported format at this time.

Michael

“half-way to world domination A.K.A. the belligerent blue bike shed”

[Michael Rampe]

For windows help look at:
https://ffmpeg.arrozcru.org/ from https://www.ffmpeg.org

Michael

“half-way to world domination A.K.A. the belligerent blue bike shed”

[Michael Rampe]

Seems strange that it is not consistent across files.

You should certainly be able to achieve those bitrates at those image sizes.

You are running an old version of FFmpeg. libx264 requires presets to work in newer builds. Try adding “-vpre hq” to your command.

The latest stable build is 0.5.2. I would also recommend investigating the latest SVN build which is what I use.

Michael

“half-way to world domination A.K.A. the belligerent blue bike shed”

[Michael Rampe]

Try adding “-vglobal 1” to your encoding command. This will force the global headers.

Michael

“half-way to world domination A.K.A. the belligerent blue bike shed”

[Michael Rampe]

It looks like you are hitting the minimum bitrate threshold for the image size you are using. 100k is very low and is less than what is required to create a stream at SD or HD image sizes.

Have a look at https://forums.creativecow.net/readpost/291/4 for a brief description of minimum and maximum bitrates.

Try reducing the output image size or frame rate until you get the result you desire.

Also, can you post the full FFmpeg readout so I can see the image size/frame rate and input/output bitrates?

Michael

“half-way to world domination A.K.A. the belligerent blue bike shed”

[Michael Rampe]

[nayan kapadia] “How to keep FPS 30 during transcoding?”

The fps reported DURING transcoding does not relate to the final fps. This is merely an indication of how many frames it is processing per second.

Many factors influence this encoding speed. Size, codec, parameters etc.

If you really want real time encoding, I would suggest tweaking the encoding parameters and frame size until you get a satisfactory result within your speed limits.

What codec are you using?

Michael

“half-way to world domination A.K.A. the belligerent blue bike shed”

[Michael Rampe]

I have not had any experience running FFmpeg on windows (only Linux/OSX.) I would have a look at the advice on windows builds from the main FFmpeg page. https://www.ffmpeg.org https://ffmpeg.arrozcru.org/

Michael

“half-way to world domination A.K.A. the belligerent blue bike shed”

[Michael Rampe]

I cannot think of a way to do what you need within FFmpeg but it could be easily solved writing a shell script.

The command that produces the single frame takes less than a second on my setup. Seeing that you have specified the rate to be 1fps for pulling the frames, you could write a script that calls the same command from FFmpeg every second overwriting the previous frame and thus producing the desired result.

Michael

“half-way to world domination A.K.A. the belligerent blue bike shed”