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H.264 with "Lossless Output" enabled gives lossy output
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System Information
OS: Ubuntu 13.10
Linux kernel: 3.11.0-15-generic

VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
3D controller: NVIDIA Corporation GK107M [GeForce GT 750M] (rev a1)

Blender Version
Broken: 2.69 7c69215

Short description of error

Choosing the Lossless Output option and a low bitrate gives a video with lossy compression.

Exact steps for others to reproduce the error
(1) Open new Blender file
(2) Under Render tab, under Output header, select H.264 for the File Format.
(3) Under Render tab, under Encoding header, select H.264 for format, enable "Lossless Output" and set (Video) Bitrate to 100.
(4) (Optional) set End frame to 50
(5) Press Animation
(6) Open the final video file in any video player and notice the lossy compression (I tested in VLC, Totem and Blender's VSE)

In addition to this bug, I also believe that once "Lossless Output" is selected, the options below should be greyed out to indicate they have no effect.

Step 1-4 have been completed already in this .blend file:

Here is a screenshot of the (paused) output video:

Event Timeline

Garrett (Garrett) raised the priority of this task from to Needs Triage by Developer.
Garrett (Garrett) updated the task description. (Show Details)
Garrett (Garrett) set Type to Bug.

This is still broken.
Bitrate still has effect on H.264 Lossless rendering.

On a ~1 min video:
Setting a bitrate of 20.000 gives me a 70Mb rendered file. Changing bitrate to 200 gives a 2Mb crappy looking file...

Blender 2.76b

If you've got bug, please open a new report instead of poking in 2 years old report.. include .blend file and instructions how you test lossy vs. lossless results.

Yes, because it's the exact same bug as this that is said to be fixed, that is the rational thing to do.