10 Replies Latest reply on Aug 13, 2015 4:51 AM by ptal78

    Video rendering is extremely slow

    Tomchook Level 1


      I'm using Adobe Premiere Pro CS4 v4.2.1 (I can't use CS5 because I have a 32-bit system). I'm running it on HP Pavilion dv9750, 2.2GHz Intel Core 2 Duo processor T7500, 2GB RAM (DDR2) and NVIDIA GeForce 8400M GS.

      I first edit my clip with Windows Live Movie Maker 2011 (Build 15.4.3538.0513) (about 4 minutes length, including videos, photos and audio), and exported it into a 1080p WMV file. The total file size was 350mb, and the rendering took about 10 minutes.

      Then I used Premiere because I needed to add a photo as a watermark to certain scenes, and I couldn't do it with WLMM. Since I'm new at working with Premiere, I created a new project, imported the WMV and the photo, added the photo to the "video 2" channel (the actual clip is in "video 1" channel), resized it, placed it at the correct location, and set the length as I needed.


      Then I wanted to render my project, so I clicked on export >> media >> and changed the format into H.264. Then I clicked OK, and Adobe Media Encoder CS4 opened. I clicked "start queue", and it started rendering for whole 9 hours! Eventually the file output was 104mb, with black bars (something was wrong the the proportions I guess), and the quality was lower than the original file, even though the preset was AVC-I 50 1080p25.


      I'm planning to create other projects, but how do I avoid these problems, especially the long rendering time? I think it's an absurd that it takes to render a file with better quality in just 10 minutes with WVMM compared to 9 hours with Premiere.


      Thank you for your help in advance!



        • 2. Re: Video rendering is extremely slow
          John T Smith Adobe Community Professional & MVP

          Note... rendering is when you press the enter key to render the video on the timeline for viewing... exporting is what you do to create a new file




          >imported the WMV


          WMV is a compressed output file, not really meant to be edited... as such, you are adding a new level of compression when you create a new file

          • 3. Re: Video rendering is extremely slow
            Tomchook Level 1

            I'm sorry, but none of you helped me to figure a way to export my video in different settings that would improve the export time. I understand that I should buy a better computer, but it just seems irrational that it's so easy to compress and export such a big file in WLMM and it takes so much system effort to do a similar thing with premiere, which gives a lower quality output..


            Thanks for the black bars guide. I'll use it. But could you please address the settings of my export please? Anything that might speed things up?

            • 4. Re: Video rendering is extremely slow
              Jeff Bellune Level 6

              Why are you editing in WLMM in the first place?


              H.264 is incredibly processor intensive.  A core2 duo will be very, very slow rendering to HD H.264.  And if your source footage wasn't HD, then upscaling to HD will result in a very noticeable quality loss.


              If you want useful output from the forum, you need to provide useful input.  GIGO and all that.  You're off to a good start, but we need more.  Read here:


              Adobe Forums: FAQ: What information should I provide when asking a question on this forum?



              • 5. Re: Video rendering is extremely slow
                Stan Jones Adobe Community Professional & MVP

                a way to export my video in different settings that would improve the export time.

                As Jeff points out, for HD material you face a long export at some point in the process.


                Short of hardwareupgrades, the best way to save time is to export once, rather than twice. Since you have encore, edit in Premiere, and bypass WMM entirely.


                If you want to use WMM for some other reason, do you have Windows Movie Maker (pre windows 7 version) or Windows Live Movie Maker? The export options were always weak, but very limited in WLMM. Quality, as well as time, will be your problem using this workflow. The best you can do there is to maximize the datarate using a wmv file

                • 6. Re: Video rendering is extremely slow
                  the_wine_snob Level 9

                  You have two strikes (well, three, depending on how you count) against you.


                  WMV is heavily-compressed, as is H.264. They each take a lot of processing horsepower, and you completely lack that.


                  I would begin the Encoding process, and then go get lunch, and probably not "take out," depending on the Duration of your Timeline.


                  Good luck,



                  • 7. Re: Video rendering is extremely slow
                    Stan Jones Adobe Community Professional & MVP

                    At risk of Jeff sending me to the lounge, I'll just say that overnight is more practical, but a meal is more poetic. Nine hours (see original post) is more like Brunch through Dinner... with a nice bottle of wine.

                    • 8. Re: Video rendering is extremely slow
                      the_wine_snob Level 9

                      Yes, that is about what I was thinking, hence the "probably not take out... "


                      Going back a year, or two, I was handed three WMV's to just join, create some Menus, and author to DVD. The client refused to look for the material, prior to WMV. The total Duration, IIRC, was about 120 mins. total. In anger, I loaded them into PrPro, and did the light Trimming, then went to Export to bring into Encore. On the workstation, this was going very slowly. Client called, and pushed up the deadline, so I grabbed the laptop, converted his WMV's to DV-AVI, brought those into PrPro, Trimmed, and Exported to DV-AVI. Imported that file into Encore, re-did the Menus, and burned the DVD, just as the courier arrived. It was still almost an hour later, that the WMV Project finished, and would still have had to Import into Encore to author. Somewhere, I posted the times, but the differences were drastic. Even with the time to do a batch convert on the WMV's, the little laptop beat the workstation by at least an hour, or maybe more.


                      WMV is fine for streaming media, in final delivery, but is horrible to try to edit, even if it is a supported format/CODEC.



                      1 person found this helpful
                      • 9. Re: Video rendering is extremely slow
                        Jim_Simon Level 9

                        Anything that might speed things up?


                        You don't speed things up by changing the export settings.  Those settings are determined by the intended use of the output file.


                        You speed things up with faster hardware.

                        1 person found this helpful
                        • 10. Re: Video rendering is extremely slow



                          I cut my speed from 6hrs down to 40 minutes using a small trick.


                          I couldn't believe it, but read on to see why my choice involves a Microsoft product - gee - it's come to this!


                          Premiere doesn't really work so well with WMV for speed, but if you convert all your video to mp4 first, and then use mp4 in Premiere you can save heaps of time rendering. My 40min time was actually 20min converting the files to mp4 in another software, then just 20min to do the final render in Premiere. So Premiere is actually about 20x faster working with MP4 than it is working with native WMV of the same resolution and frame rate.


                          I hate to say it, but I actually think Adobe did this on purpose just to make people think WMV is a bad format, and have done this simply by limiting the CPU usage. Please hear me out. Using WMV, Premiere idled it's way there in 6hrs, but MP4 blasted in 20min with 90% CPU. I had Expression Encoder from Microsoft so I tried it and it amazingly converted the WMV file to MP4 in a matter of minutes. Encoder blasted the CPU at 95% to get the job done in record time (from WMV to MP4).


                          So, I thought, maybe this is just a Premiere thing and I'll try Adobe Media Encoder instead of Microsoft Expression Encoder. Damn - 4hrs for Adobe Media Convert to do the same thing Expression Encoder just did in 20min to convert WMV to MP4. I could be wrong though. Maybe Microsoft did the dirty on Adobe and stops them from converting WMV at speed, or maybe the quality is greatly different! In the end, I cancelled all the Adobe WMV conversions before the finished anyway.


                          I'm sticking with Expression Encoder to convert any WMV to MP4 and Premiere for the MP4 editing. But, please don't take offense. I could be totally wrong. I admit, I'm not an expert on the matter and I'm sure there are definitely other reasonable points of view.