|
|
| gboudro |
| Posted: Dec 17 2002, 01:37 PM |
 |
|
Unregistered
|
Is there a way to save a sequence of pictures in JPG?
I know I can save it in BMP...
Thanks |
|
| fccHandler |
| Posted: Dec 17 2002, 05:59 PM |
|
|
Administrator n00b
Group: Moderators
Posts: 3961
Member No.: 280
Joined: 13-September 02
|
It can't be done with VirtualDub, and it's not a good idea anyway since JPEG is a lossy format.
--------------------
May the FOURCC be with you... |
|
| gboudro |
| Posted: Dec 17 2002, 06:18 PM |
|
|
Unregistered
|
Thanks |
|
| Morsa |
| Posted: Dec 17 2002, 07:24 PM |
|
|
Moderator of the Vdub support board
Group: Moderators
Posts: 640
Member No.: 246
Joined: 9-September 02
|
There are many tools out there that lets you covert a whole directory of i ages to the format you want.Make yor search!
BTW , you can use Vdubmod to save PNG sequences.They need less space, and aren't lossy. |
|
| S_O |
| Posted: Dec 17 2002, 10:09 PM |
|
|
Vdubmod Alpha Testing Team
Group: Vdubmod Alpha Testing Team
Posts: 102
Member No.: 57
Joined: 25-July 02
|
Can it be done the other way round? Several times I tried to load a set of JPEG-files, but I had to convert them to bmp before.
I know VirtualDub has an internal MJPEG-Decoder, so why could these decoder not also decode several JPEG-files? It would be great if VirtualDub could lossless convert these jpeg-image-sequence to a MJPEG-stream. Or is that to difficult? |
|
| phaeron |
| Posted: Dec 18 2002, 12:37 AM |
|
|
Virtualdub Developer
Group: Administrator
Posts: 7773
Member No.: 61
Joined: 30-July 02
|
Motion JPEG, or rather, MJPEG in AVI, is a subset of JPEG -- in particular, the Huffman tables for MJPEG are fixed and thus omitted from the frames. You can convert an MJPEG field image to a baseline JPEG, but not the other way around.
|
|
| S_O |
| Posted: Dec 18 2002, 12:53 PM |
|
|
Vdubmod Alpha Testing Team
Group: Vdubmod Alpha Testing Team
Posts: 102
Member No.: 57
Joined: 25-July 02
|
| QUOTE | | Motion JPEG, or rather, MJPEG in AVI, is a subset of JPEG -- in particular, the Huffman tables for MJPEG are fixed and thus omitted from the frames. You can convert an MJPEG field image to a baseline JPEG, but not the other way around. |
Huffman is lossless compression, so it could be decompressed and recompressed lossless? The file may be bigger with a non-optimized table, but there is no loss and it should be possible.
Edit: I have some files which are looking like JPEG, but my picture-viewer (irfanview) gives me an error message like "Bogus Huffman table definition", "Bogus Marker length", "JPEG Datastream contains no image" or "Unsupported JPEG process: SOF type 0xc7". Other program just say it´s not a valid file, but what does that exactly mean?
|
|
